中国互联网络发展状况统计报告(1月).pdf

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1、 20111 27 1 1997 CNNIC 11 199817 26 27 27 ( ) 27 20111 27 2 . 1 4 6 6 9 12 12 12 13 14 15 16 16 17 17 18 18 18 19 19 20 21 22 22 IP . 22 23 24 25 26 26 28 31 27 3 31 32 34 36 38 40 42 45 45 45 46 46 46 47 / . 48 49 50 52 52 53 55 55 56 1 58 2 . 108 3 . 123 27 4 2010124.5720097330 34.3%20095.4 4.598.

2、3% 3.0320096930 200960.8%66.2% 1.2527.3%16.9% 30200938.6%41.8% 26.8%32.8%40.2% 35.7% 4.5 89.2% 35.7%33.7%23.2%16.1% 78.4%66.2%45.7% 18.3 201012IPv42.7820112IPv4 IPv4IPv6 2010866.CN435191 .CN11359.5% 98.3%100.9 KB/s 131.2 KB/s128.2 KB/s124.5 KB/s 81.9%3.75 48.6% 4.22.40.5 6311 13.8%18754.1% 27 5 67.7

3、% 59.9%56.6% 20101294.8%5.2% 92.7% 43% 58.8% 22.5% 42.1% 21.3%19.3% 15.4% 57.2% 91.7%76.5%5.4% 22.3% 20102010 45.8%200910.8 21.8%20099.7 27 6 3.1 6 3.1.1 60,00030,000 31 3.1.2 A+ + B C C 3.2 ABC 27 7 3.3 CATI 3.4 CNNIC2005 20057.4 20101111114862.8 3.2 3.2.1 5103 3.2.2 196 2 3 4 5 CNNIC 27 8 20101119

4、1231 CNNICICP/ISP 89639 IP 1IP IPAPNIC IP IP IP IPIPCNNIC APNICIP 2 .CNCNNIC gTLD gTLD .COM.NET.ORGgTLD gTLD 3 27 9 6 xDSLCABLE MODEM 3G 25 1 IP IP IP .- IP ccTLD.CN gTLD.COM.NET.ORG web .CNgTLDweb 1 1995 12 14 50 2000 1524 624 27 10 2003 20093756.56 2 8.54 3 2010 748 1 2000 300-2000 300 30000 300

5、0-30000 3000 40000 4000-40000 4000 3000 500-3000 500 30000 3000-30000 3000 200 100-200 100 30000 3000-30000 3000 500 100-500 100 15000 1000-15000 1000 800 400-800 400 15000 3000-15000 3000 2 2009 3 200812008 27 11 B2BC2CB2C 20101231 27 12 20104.5734.3% 20095.4733019.1%2010 4 23.2%55.4% 1 2010 2010 2

6、0101-11 4 http:/ 5910 7950 9400 11100 13700 21000 29800 38400 45730 4.6% 6.2% 7.2% 8.5% 10.5% 16.0% 22.6% 28.9% 34.3% 0% 5% 10% 15% 20% 25% 30% 35% 40% 0 9000 18000 27000 36000 45000 200220032004200520062007200820092010 27 13 2091.112488.9 28152.820.6%2010 20103G 100% 2010 5 4.530%98.3% 2 5 34598 44

7、953 0 8000 16000 24000 32000 40000 48000 20092010 27 14 20102010123.032009 6930200960.8% 66.2%2010 2009 2010 2009 201020093G 3G 20091 2010 2010 20107.5 201013G 3G 3G3G3G 2010 3 23344 30273 0 10000 20000 30000 20092010 27 15 2010192009 3 20094 69.4%64.5%55.3% 20092 20092 4 2010 52.7%31.1%30.2%30.2% 2

8、7 16 2 2010 1218 69.4% 10.5% 1 29 1239 64.5% 5.8% 2 31 5324 55.3% 9.5% 3 30 2786 53.8% 13.6% 4 27 648 52.7% 14.8% 5 26 1848 50.9% 13.4% 6 28 1916 44.4% 20.1% 7 21 3306 42.8% 19.6% 8 22 819 37.9% 29.1% 9 7 1250 36.5% 17.5% 10 25 3332 35.2% 20.3% 11 19 303 35.1% 24.3% 12 8 990 34.6% 23.3% 13 12 1295 3

9、4.3% 30.2% 14 3 188 33.6% 21.8% 15 15 1902 33.3% 29.5% 16 6 882 32.2% 21.5% 17 16 2197 31.2% 19.3% 18 23 747 30.8% 29.9% 19 5 1127 29.5% 23.6% 20 11 175 28.0% 24.3% 21 9 81 27.9% 52.7% 22 1 1747 27.3% 24.3% 23 10 2417 25.5% 20.4% 24 18 1226 25.2% 19.0% 25 24 655 24.8% 22.4% 26 13 1998 24.4% 22.2% 27

10、 14 1392 22.7% 30.2% 28 4 1021 22.3% 20.9% 29 17 950 21.4% 20.2% 30 20 751 19.8% 31.1% 31 2 2010 27 17 78.4%66.2%45.7% 200915 5.45 5 89.2% 35.7%33.7%23.2%16.1% 20096 3.50.4 6 201018.32.6 73.4% 60.8% 30.7% 78.4% 66.2% 45.7% 0% 20% 40% 60% 80% 100% 20092010 83.2% 35.1% 30.2% 23.0% 15.7% 89.2% 35.7% 33

11、.7% 23.2% 16.1% 0% 20% 40% 60% 80% 100% 20092010 27 18 7 201055.844.2 11.6 8 2009.12-2010.12 2010302009 38.6%41.8%10-19 18.7 18.3 15 16 17 18 19 20 20092010 54.2% 45.8% 55.8% 44.2% 0% 20% 40% 60% 20092010 27 19 9 2009.12-2010.12 201026.8%32.8%6 40.2%35.7% 4.5 10 2009.12-2010.12 2010/ 30.6%16.2%14.9%

12、2.8% 6%9.8%4.9% 1.1% 31.8% 28.6% 21.5% 10.7% 4.5% 1.9% 1.1% 27.3% 29.8% 23.4% 12.6% 3.9%1.9% 0% 5% 10% 15% 20% 25% 30% 35% 1010-1920-2930-3940-4950-5960 20092010 8.8% 26.8% 40.2% 12.2% 12.1% 8.4% 32.8% 35.7% 11.8% 11.4% 0% 10% 20% 30% 40% 50% 20092010 27 20 11 2009.12-2010.12 2009500 18%19.4%501-200

13、041.7%42.8% 10%4.6% 30.6% 5.8% 4.3% 16.2% 8.7% 3.5% 2.9% 14.9% 6.0% 1.7% 4.9% 0.5% 28.8% 7.5% 3.1% 15.0% 10.4% 2.4% 4.4% 13.0% 2.8% 2.1% 9.8% 0.8% 0%10%20%30%40% / / / / 20092010 27 21 12 2009.12-2010.12 20101.25 27.3%16.9% 13 2009.12-2010.12 4.6% 19.4% 15.1% 13.2% 14.5% 16.2% 10.5% 3.7% 2.9% 10.0%

14、18.0% 14.5% 13.7% 13.4% 15.4% 9.3% 2.7% 2.9% 0%5%10%15%20%25% 500 5011000 10011500 15012000 20013000 30015000 50018000 8000 20092010 72.2% 27.8% 72.7% 27.3% 0% 20% 40% 60% 80% 20092010 27 22 201012IPv42.78IANA20112IPv4 IPv4IPv6 866.CN435191.CN 11359.5% 20101,098,956.82Mbps26.9% 3 2009.12-2010.12 200

15、912 201012 IPv4 232,446,464 277,636,864 45,190,400 19.4% 16,818,401 8,656,525 -8,161,876 -48.5% CN 13,459,133 4,349,524 -9,109,609 -67.7% 3,231,838 1,908,122 -1,323,716 -41.0% CN 2,501,308 1,134,379 -1,366,929 -54.7% Mbps 866,367.20 1,098,956.82 232,590 26.9% IP 201012IPv42.78IANA20112IPv4 IPv4IPv6I

16、Pv632 128IP IPv6IPv4IPv6 IPv4IPv6 27 23 14 2006.12-2010.12IPv4 866.CN435.CN50.2% 4 CN 4,349,524 50.2% COM 3,713,244 42.9% NET 488,478 5.6% ORG 105,279 1.2% 8,656,525 100% CN.CNCN60.5% .COM.CN31.2% 5 CN CN cn 2,629,697 60.5% 1,357,969 31.2% 169,455 3.9% 67,889 1.6% 64,290 1.5% 52,155 1.2% 4,276

17、 0.1% 3,774 0.1% 19 0.0% 4,349,524 100% 9802 13527 18127 23245 27764 31.8% 38.0% 34.0% 28.2% 19.4% 0% 10% 20% 30% 40% 0 5000 10000 15000 20000 25000 30000 2006.122007.122008.122009.122010.12 IPv4 27 24 201012 19141% 15 2006.12-2010.12 .EDU.CN 84 150 288 323 191 21.7% 78.4% 91.4% 12.3% -41.0% -60%

18、-40% -20% 0% 20% 40% 60% 80% 100% 0 50 100 150 200 250 300 350 2006.122007.122008.122009.122010.12 27 25 2003 201060078.6% 16 2003-2009 2010/ 1.3:11.14:131,414 202% 6 6 2009 2010 33,601,732,128 60,008,060,093 78.6% 18,998,243,013 31,908,739,278 68.0% 56.54% 53.17% 14,603,489,115 28,099,320,815 92.4%

19、 43.46% 46.83% / 1.3:1 1.14:1 KB 1,059,950,881,533 1,922,538,540,426 81.4% 10,397 31,414 202% KB 31.5 32 1.6% 6 45 85 161 336 600 71.9% 89.5% 161.0% 108.8% 78.6% 0% 50% 100% 150% 200% 0 100 200 300 400 500 600 700 2006.122007.122008.122009.122010.12 27 26 20101,098,956.82Mbps26.8% 17 2006.12-2010.12

20、 7 Mbps 660612.82 357433 49124 18120 11655 2 1098956.82 IDC7 20 3124 20 98.3%100.9 KB/s230.4 KB/s 8 7 IDC IDC 8 Akamai 2010 256696 368927 640287 866367.2 1098956.82 88.6% 43.7% 73.6% 35.3% 26.8% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0 200000 400000 600000 800000 1000000 1200000 2006.122007.122

21、008.122009.122010.12 Mbps 27 27 131.2 KB/s128.2 KB/s124.5 KB/s IDCCNNIC Lastmile9 8 (KB/s) 1 131.2 2 128.2 3 124.5 4 120.4 5 116.9 6 115.7 7 115.5 8 110.1 9 109.0 10 108.1 11 106.3 12 105.9 13 105.7 14 105.7 15 105.6 16 104.0 17 101.4 18 100.0 19 99.4 20 97.0 21 92.6 22 88.6 23 88.3 24 87.8 25 87.3

22、26 84.0 27 83.1 28 82.0 29 76.6 30 74.4 31 73.2 100.9 9 Lastmile 27 28 IP 10 CNNIC 2005CNNIC.CN 20052005 2007 14 9 IP 0.3004 0.2435 0.2727 0.1833 =/*100 =0.30048IP+0.2435+0.2727+0.1833 10 2005-2010 IP Mbps 2005 7439 259 69 136106 2006 8479 296 79 214175 2006 9802 411 84 256696 2007 11825 918 131 312

23、346 2007 13527 1193 150 368927 2008 15814 1485 192 493729 2008 18127 1683 288 640287 2009 20503 1626 306 747541 2009 23245 1682 323 866367 2010 25045 1121 279 998217 2010 27764 866 191 1098957 10 IPIPv4 27 29 11 2005-2010 IP Mbps 2005 670.2 23.4 6.3 1.23 2006 689.3 24.1 6.4 1.74 2006 715.5 30 6.2 1.

24、87 2007 729.9 56.7 8.1 1.93 701.2 33.5 6.7 1.69 2007 644.1 56.8 7.2 1.76 2008 625.1 58.7 7.6 1.95 2008 608.3 56.5 9.7 2.15 2009 606.6 48.1 9.1 2.21 2009 605.3 43.8 8.4 2.26 2010 596.3 26.7 6.6 2.38 2010 607.1 18.9 4.2 2.40 12 IP 100 100 100 100 107.7 2007 91.9 169.6 107.5 104.1 124.2 2008 89.1 175.2

25、 113.4 115.4 126.4 2008 86.8 168.7 144.8 127.2 132.6 2009 86.5 143.6 135.8 130.8 124.0 2009 86.3 130.7 125.4 133.7 118.0 2010 85.0 79.7 98.5 140.8 97.9 2010 86.6 56.4 62.7 142.0 82.9 20052009 IP IP2007IPIP IPIP IP 20072010 27 30 20072008IP 2009 2010 IP Ipv6 18 2007-2010 50 70 90 110 130 150 170 190

26、2007.122008.62008.122009.62009.122010.62010.12 IP 27 31 2010 201012 631113.8%18754.1% 13 2009.122010.12 2010 2009 37453 81.9% 28134 73.3% 33.1% 36218 79.2% 32074 83.5% 12.9% 35304 77.2% 30769 80.1% 14.7% 35258 77.1% 27233 70.9% 29.5% 30410 66.5% 26454 68.9% 15.0% 29450 64.4% 22140 57.7% 33.0% 28398

27、62.1% 24044 62.6% 18.1% 24969 54.6% 21797 56.8% 14.6% 23505 51.4% 17587 45.8% 33.7% 19481 42.6% 16261 42.3% 19.8% 16051 35.1% 10800 28.1% 48.6% /BBS 14817 32.4% 11701 30.5% 26.6% 13948 30.5% 9412 24.5% 48.2% 13719 30.0% 9406 24.5% 45.9% 7088 15.5% 5678 14.8% 24.8% 6311 13.8% - - - 3613 7.9% 3024 7.9

28、% 19.5% 1875 4.10% - - - 27 32 2010 48.6% 45.8%48.2% 4.32.40.5 33.7%29.5%33% 2010 1. 20103.75931933.1% 8.681.9% SNSWeb2.0 2010 2010 27 33 19 2009.12-2010.12 2. 20101277.2%3.53 453514.7% 20 2009.12-2010.12 28134 37453 73.3% 81.9% 0% 20% 40% 60% 80% 100% 0 10000 20000 30000 40000 20092010 30769 35304

29、80.1% 77.2% 0% 20% 40% 60% 80% 100% 0 10000 20000 30000 40000 20092010 27 34 1. 2010121.6135.1% 7 201048.6% 2010 B2C2010 21 2009.12-2010.12 2 20102010121875 2011 2010 2010 2010 10800 16051 28.1% 35.1% 20% 30% 40% 0 5000 10000 15000 20000 20092010 27 35 3 20102010121.37 30%2009431345.9% 320071.04 201

30、0 2010 2010 201091 3G 22 2009.12-2010.12 4 20101236137.9% 200958919.5% 2010 201019.5% 201066% 7.9% 9406 13719 24.5% 30.0% 10% 15% 20% 25% 30% 35% 0 5000 10000 15000 20092010 27 36 23 2009.12-2010.12 1. 2010123.5320098025 29.5%200777.1% 20096.2 24 2009.12-2010.12 2. 2010126.764.4% 2.95731033% SNS SNS

31、 3024 3613 7.9% 7.9% 0% 2% 4% 6% 8% 10% 1000 2000 3000 4000 5000 20092010 27233 35258 70.9% 77.1% 56% 60% 64% 68% 72% 76% 80% 0 10000 20000 30000 40000 20092010 27 37 SNS 25 2009.12-2010.12 3 2010631113.8% 15.5% 2010 22140 29450 57.7% 64.4% 0% 20% 40% 60% 80% 0 10000 20000 30000 40000 20092010 27 38

32、 4 201012 2.35591851.4%20095.6 26 2009.12-2010.12 1. 2010123.0420093956 15%200968.9%66.5% 17587 23505 45.8% 51.4% 20% 30% 40% 50% 60% 0 5000 10000 15000 20000 25000 20092010 27 39 27 2009.12-2010.12 2. 20101242.6%1.952009 19.9% 28 2009.12-2010.12 3. 2010122.8462.1% 200912435418.1% 26454 30410 68.9%

33、66.5% 60% 65% 70% 75% 0 10000 20000 30000 40000 20092010 16261 19481 42.3% 42.6% 0% 10% 20% 30% 40% 50% 0 5000 10000 15000 20000 25000 20092010 27 40 29 2009.12-2010.12 2010 2010 67.7% 59.9% 2 24044 28398 62.6% 62.1% 0% 10% 20% 30% 40% 50% 60% 70% 0 10000 20000 30000 20092010 27 41 11 12 45 201036.6

34、% 20106.1%9.4 2009 3G3G 30 11 webwap 12 QQ 3.7% 4.9% 7.1% 8.4% 15.5% 21.9% 22.0% 25.8% 27.4% 36.6% 41.1% 46.2% 56.6% 59.9% 67.7% 0%20%40%60%80% 27 42 CNNIC CNNIC CNNIC 14 / CNNIC 27 43 14 15 0.2337 0.3155 0.2151 0.2357 =0.2337+0.3155+0.2151 +0.2357 31 2007-2010 2007 51.1201057.6 20072010 9.924.347.5

35、50.8 2009 51.1 53.2 56.1 57.6 7373.3 76.7 79.6 68.171.4 71.7 69.3 47.5 47 49 50.8 9.9 16 20.2 24.3 0 20 40 60 80 100 2007200820092010 27 44 16 2007-2009 2007 2008 2009 2010 51.1 53.2 56.1 57.6 73.0 73.3 76.7 79.6 68.1 71.4 71.7 69.3 47.5 47.0 49.0 50.8 13 9.9 16.0 20.2 24.3 201057.6 / 17 2010 57.6 7

36、9.6 77.2% 82.0% 69.3 79.2% 66.5% 62.1% 50.8 77.1% 54.6% 39.9% / 31.7% 24.3 35.1% 30.0% 7.9% 13 2007 2007 27 45 14 20101294.8%5.2% 92.7% 15 100% 1 2 32 14 15 20093 756.56 8.54 748 83.5% 94.9% 97.4% 98.0% 75% 80% 85% 90% 95% 100% 1011100101500501 92.7% 27 46 16 20101243%27.8% 33 34 99% 16 24.8% 48.1%

37、63.2% 80.0% 0% 20% 40% 60% 80% 100% 1011100101500501 43% 14.1% 32.2% 39.6% 45.7% 0% 10% 20% 30% 40% 50% 1011100101500501 27.8% 27 47 / 35 36 57.2% 52.0% 49.6% 46.4% 42.1% 40.4% 11.1% 0%10%20%30%40%50%60%70% / 96.1% 92.2% 88.0% 74.6% 46.2% 43.5% 35.6% 30.1% 4.5% 0%20% 40% 60% 80% 100%120% , 27 48 37

38、18% 38 / 42.1% 21.3% CRM 14.5% 20.2% 6.4% 35.0% 23.8% 18.0% 65.4% 16.6% 27 49 39 57.2% 50.2% 21.3% 19.3% 15.4% 14.7% 12.7% 7.1% 5.5% 5.2% 1.1% 0%5%10%15%20%25% 27 50 40 66.4% 41 76.6% 50.2% 34.0% 14.1% 14.9% 0%10%20%30%40%50%60% 9.3% 17.7% 6.6% 66.4% 27 51 42 72.3% 43 14.9% 85% 44 23.4% 76.6% 27.7%

39、72.3% 25.0% 14.9% 60.0% 27 52 48.3% 35.4% 23.3% 40.7% 45 46 48.3% 35.4% 23.3% 40.7% 0%10% 20% 30% 40% 50% 60% 8.2% 13.4% 36.5% 63.1% 74.2% 57.5% 28.7% 12.5% 6.0% 0% 10% 20% 30% 40% 50% 60% 70% 80% 27 53 22.5% 47 41.4% 16.3% 48 22.3% 22.5% 49.8% 27.7% 41.4% 42.3% 16.3% 27 54 49 50 22.3% 77.7% 81.8% 4

40、9.5% 41.0% 5.4% 0%20%40%60%80%100% 27 55 2010 201045.8%200910.8 2.172.09800 51 21.8%20099.7 20091.2199692000 56.6% 45.8% 43.4% 54.8% 0% 20% 40% 60% 80% 100% 20092010 27 56 52 2009 CNNIC 20102345522573 6168863551 8220101231CN 17 97.2%CN100%CN 91.7% 76.5%5.4% 53 17 = (+) (- ) 31.5 21.8 68.5 78.2 0% 20

41、% 40% 60% 80% 100% 20092010 91.7% 76.5% 2.6% 5.4% 0%20%40%60%80%100% 27 57 54 13.4% 3.6% 2.9% 28.4% 51.7% 27 58 1 2 20 01 11 1 1 1 2011 & 27 59 1 2003 CNNIC1 684CNNIC CNNIC 2001 World Internet Project, WIP 188420051874WIP CNNIC 2 Pocket PCPDA() 3 WiFiHSDPAWCDMACDMA2000 GPRS WiFi 4 2010123 5 , () 6 2

42、001 2003 World Internet Project, WIP Asia-Pacific Internet Research Alliance, APIRA / 27 60 7.1.1.1 2010 * 18 15.5 14.4 87% 81% 100% 97% 09178,0002010 09182,683 * 7.1.1.2 2003 57% 30% 27% 2004 59% 23% 35% 2005 62% 12% 49% 2006 72% 7% 64% 2007 77% 3% 74% 2008 81% 2% 79% 2009 83% 1% 80% 2010 87% 0% 81

43、% 7.1.1.1 57% 59% 62% 72% 77%81% 83%87% 30% 23% 12% 7% 3% 2% 1%0% 27% 35% 49% 64% 74% 79% 80% 81% 0% 20% 40% 60% 80% 100% 20032004200520062007200820092010 : 2001-2010 27 61 7.1.1.3 1 () 2001(2) 22% 78% 0.0% 2003 47% 51% 1.9% 2004 60% 39% 0.9% 2005 79% 20% 1.0% 2006 89% 10% 0.5% 2007 96% 4% 0.6% 2008

44、 97% 3% 0.1% 2009 97% 1% 2.0% 2010 97% 0% 3.0% (1)2002 (2) WIP 7.1.1.2 , 201087% 97%20012010 22%97% 2010CNNIC684 22% 47% 60% 79% 89% 96% 97% 97% 97% 78% 51% 39% 20% 10% 4% 3% 1% 0% 0% 2% 0.9% 1% 0.5% 0.6%0.1% 2% 3% 0% 20% 40% 60% 80% 100% 2001 (WIP) 20032004200520062007200820092010 () : 2001-2010 27

45、 62 3651.770%2.4% 34.737.2 WIP188430.5 46.566%2.5% 29.4 31.7 7.1.2.1 2001 1 33% 15% 52% 2003 40% 10% 51% 2004 46% 8% 46% 2005 53% 7% 40% 2006 55% 7% 38% 2007 64% 3% 33% 2008 66% 1% 33% 2009 70% - 30% 2010 70% - 30% (1)WIP 7.1.2.1 33% 40% 46% 53% 55% 64% 66% 70%70% 15% 10% 8% 7%7% 3% 1% 52% 51% 46% 4

46、0% 38% 33%33% 30%31% 0% 20% 40% 60% 80% 2001 (WIP) 20032004200520062007200820092010 : 2001-2010 27 63 200133%201070% 2010 2009 19952010 7.1.2.2 1995 3% 1996 4% 1997 6% 1998 10% 1999 16% 2000 25% 2001 33% 2002 36% 2003 40% 2004 46% 2005 53% 2006 55% 2007 64% 2008 66% 2009 70% 2010 70% 7.1.2.2 3% 4% 6

47、% 10% 16% 25% 33% 36% 40% 46% 53% 55% 64% 66% 70%70% 0% 20% 40% 60% 80% 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 : 2001-2010 27 64 1 7.1.3.1 2003 2004 2005 2006 2007 2008 2009 2010 42% 49% 53% 59% 68% 69% 73% 70% 37% 43% 53% 52% 60% 63% 67% 65% 2005(53%) 201070

48、%65% 7.1.3.1 42% 49% 53% 59% 68% 69% 73% 70% 37% 43% 53% 52% 60% 63% 67% 65% 0% 20% 40% 60% 80% 100% 20032004200520062007200820092010 : 2001-2010 27 65 2 7.1.3.2 2003 2004 2005 2006 2007 2008 2009 2010 18 44% 67% 74% 82% 88% 94% 97% 95% 18-24 84% 88% 95% 94% 97% 99% 100% 100% 25-30 70% 78% 81% 88% 90% 91% 97% 97% 31-35 48% 59% 61% 68% 84% 82% 94% 91% 36-40 40% 41% 56% 54% 64% 73% 79% 85% 41-50 20% 22% 33% 33% 46% 45% 51% 49% 51-60 14% 9% 18% 17% 23% 23% 31% 26% 60 1% 1% 6% 7% 9% 12% 16% 11% 20032009 201051-6060 18-24(100%)25-30(97%) 18 1824100%60 11% 1