| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 6794 | 63 | 1832 |
| 1997 | 7859 | 64 | 2328 |
| 1998 | 7845 | 34 | 2326 |
| 1999 | 8249 | 41 | 2401 |
| 2000 | 8708 | 37 | 2824 |
| 2001 | 8838 | 68 | 2868 |
| 2002 | 9738 | 118 | 2740 |
| 2003 | 9983 | 127 | 2749 |
| 2004 | 10424 | 166 | 2749 |
| 2005 | 10902 | 218 | 3069 |
| 2006 | 12176 | 569 | 3838 |
| 2007 | 12162 | 691 | 4238 |
| 2008 | 12361 | 711 | 3992 |
| 2009 | 13129 | 778 | 4128 |
| 2010 | 14130 | 839 | 4522 |
| 2011 | 14521 | 859 | 4526 |
| 2012 | 15014 | 1048 | 4788 |
| 2013 | 15756 | 1166 | 5263 |
| 2014 | 15759 | 1426 | 5173 |
| 2015 | 16793 | 1726 | 5357 |
| 2016 | 16547 | 1982 | 5121 |
| 2017 | 16421 | 1961 | 5055 |
| 2018 | 16882 | 2288 | 5257 |
| 2019 | 17132 | 3282 | 5236 |
| 2020 | 18690 | 4118 | 5689 |
| 2021 | 20349 | 6771 | 5856 |
| 2022 | 19419 | 8378 | 5831 |
| 2023 | 18855 | 7998 | 5830 |
| 2024 | 19935 | 9745 | 6107 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 6556 | 62 | 1750 |
| 1997 | 7609 | 64 | 2225 |
| 1998 | 7541 | 33 | 2174 |
| 1999 | 7817 | 39 | 2203 |
| 2000 | 8260 | 37 | 2613 |
| 2001 | 8256 | 68 | 2611 |
| 2002 | 8999 | 118 | 2464 |
| 2003 | 8962 | 124 | 2411 |
| 2004 | 9450 | 163 | 2394 |
| 2005 | 9781 | 216 | 2694 |
| 2006 | 10758 | 554 | 3288 |
| 2007 | 10632 | 686 | 3626 |
| 2008 | 10850 | 699 | 3503 |
| 2009 | 11674 | 771 | 3561 |
| 2010 | 12606 | 823 | 3691 |
| 2011 | 12863 | 830 | 3771 |
| 2012 | 13297 | 1022 | 3966 |
| 2013 | 13778 | 1123 | 4347 |
| 2014 | 13427 | 1364 | 4241 |
| 2015 | 14242 | 1658 | 4438 |
| 2016 | 14103 | 1902 | 4204 |
| 2017 | 13881 | 1904 | 4183 |
| 2018 | 14182 | 2210 | 4360 |
| 2019 | 14473 | 3180 | 4360 |
| 2020 | 15820 | 3950 | 4651 |
| 2021 | 17595 | 6644 | 5000 |
| 2022 | 16939 | 8197 | 5042 |
| 2023 | 16169 | 7799 | 4913 |
| 2024 | 17517 | 9298 | 5239 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 238 | 1 | 82 |
| 1997 | 250 | 0 | 103 |
| 1998 | 304 | 1 | 152 |
| 1999 | 432 | 2 | 198 |
| 2000 | 448 | 0 | 211 |
| 2001 | 582 | 0 | 257 |
| 2002 | 739 | 0 | 276 |
| 2003 | 1021 | 3 | 338 |
| 2004 | 974 | 3 | 355 |
| 2005 | 1121 | 2 | 375 |
| 2006 | 1418 | 15 | 550 |
| 2007 | 1530 | 5 | 612 |
| 2008 | 1511 | 12 | 489 |
| 2009 | 1455 | 7 | 567 |
| 2010 | 1524 | 16 | 831 |
| 2011 | 1658 | 29 | 755 |
| 2012 | 1717 | 26 | 822 |
| 2013 | 1978 | 43 | 916 |
| 2014 | 2332 | 62 | 932 |
| 2015 | 2551 | 68 | 919 |
| 2016 | 2444 | 80 | 917 |
| 2017 | 2540 | 57 | 872 |
| 2018 | 2700 | 78 | 897 |
| 2019 | 2659 | 102 | 876 |
| 2020 | 2870 | 168 | 1038 |
| 2021 | 2754 | 127 | 856 |
| 2022 | 2480 | 181 | 789 |
| 2023 | 2686 | 199 | 917 |
| 2024 | 2418 | 447 | 868 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 5580 | 45 | 1525 |
| 1997 | 6390 | 43 | 1857 |
| 1998 | 6319 | 34 | 1920 |
| 1999 | 6610 | 39 | 1979 |
| 2000 | 7198 | 34 | 2313 |
| 2001 | 7335 | 67 | 2351 |
| 2002 | 7964 | 106 | 2180 |
| 2003 | 8327 | 111 | 2273 |
| 2004 | 8645 | 146 | 2314 |
| 2005 | 9221 | 193 | 2552 |
| 2006 | 9655 | 324 | 2904 |
| 2007 | 9592 | 418 | 3198 |
| 2008 | 10036 | 445 | 3158 |
| 2009 | 10658 | 554 | 3304 |
| 2010 | 11512 | 612 | 3460 |
| 2011 | 11865 | 656 | 3554 |
| 2012 | 12365 | 851 | 3765 |
| 2013 | 13212 | 982 | 4204 |
| 2014 | 13019 | 1231 | 4100 |
| 2015 | 13947 | 1518 | 4304 |
| 2016 | 13919 | 1674 | 4078 |
| 2017 | 13825 | 1734 | 4083 |
| 2018 | 14293 | 2048 | 4334 |
| 2019 | 14554 | 2738 | 4408 |
| 2020 | 15903 | 3554 | 4805 |
| 2021 | 16874 | 5753 | 4929 |
| 2022 | 15267 | 7184 | 4585 |
| 2023 | 12471 | 5985 | 3966 |
| 2024 | 5818 | 3322 | 2091 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 1214 | 18 | 307 |
| 1997 | 1469 | 21 | 471 |
| 1998 | 1526 | 0 | 406 |
| 1999 | 1639 | 2 | 422 |
| 2000 | 1510 | 3 | 511 |
| 2001 | 1503 | 1 | 517 |
| 2002 | 1774 | 12 | 560 |
| 2003 | 1656 | 16 | 476 |
| 2004 | 1779 | 20 | 435 |
| 2005 | 1681 | 25 | 517 |
| 2006 | 2521 | 245 | 934 |
| 2007 | 2570 | 273 | 1040 |
| 2008 | 2325 | 266 | 834 |
| 2009 | 2471 | 224 | 824 |
| 2010 | 2618 | 227 | 1062 |
| 2011 | 2656 | 203 | 972 |
| 2012 | 2649 | 197 | 1023 |
| 2013 | 2544 | 184 | 1059 |
| 2014 | 2740 | 195 | 1073 |
| 2015 | 2846 | 208 | 1053 |
| 2016 | 2628 | 308 | 1043 |
| 2017 | 2596 | 227 | 972 |
| 2018 | 2589 | 240 | 923 |
| 2019 | 2578 | 544 | 828 |
| 2020 | 2787 | 564 | 884 |
| 2021 | 3475 | 1018 | 927 |
| 2022 | 4152 | 1194 | 1246 |
| 2023 | 6384 | 2013 | 1864 |
| 2024 | 14117 | 6423 | 4016 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 177261 | 1176 | 50453 |
| 1997 | 234773 | 4943 | 56112 |
| 1998 | 243176 | 1506 | 64291 |
| 1999 | 269520 | 1395 | 70686 |
| 2000 | 328822 | 2394 | 108204 |
| 2001 | 317251 | 3590 | 89102 |
| 2002 | 365598 | 6768 | 87241 |
| 2003 | 382960 | 5397 | 105596 |
| 2004 | 420237 | 10591 | 128279 |
| 2005 | 396984 | 6960 | 105604 |
| 2006 | 392495 | 8631 | 112243 |
| 2007 | 383467 | 14341 | 117242 |
| 2008 | 395732 | 17093 | 122556 |
| 2009 | 413345 | 19948 | 116409 |
| 2010 | 424884 | 22154 | 127754 |
| 2011 | 390386 | 21628 | 114795 |
| 2012 | 388592 | 34583 | 119696 |
| 2013 | 398817 | 33819 | 129130 |
| 2014 | 363422 | 45576 | 114049 |
| 2015 | 376301 | 50487 | 133092 |
| 2016 | 340133 | 52517 | 115387 |
| 2017 | 316297 | 54497 | 109798 |
| 2018 | 291810 | 57185 | 105869 |
| 2019 | 260762 | 62811 | 91602 |
| 2020 | 248702 | 75889 | 98570 |
| 2021 | 187177 | 77064 | 68867 |
| 2022 | 111381 | 67651 | 41218 |
| 2023 | 52882 | 31892 | 19476 |
| 2024 | 12482 | 7321 | 4980 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 97425 | 905 | 37557 |
| 1997 | 129364 | 4227 | 41300 |
| 1998 | 133376 | 1138 | 48285 |
| 1999 | 150360 | 1138 | 54298 |
| 2000 | 192933 | 1864 | 85078 |
| 2001 | 180405 | 2954 | 67844 |
| 2002 | 210272 | 5149 | 66991 |
| 2003 | 218594 | 4137 | 82146 |
| 2004 | 240417 | 7529 | 103374 |
| 2005 | 223280 | 5261 | 81991 |
| 2006 | 220735 | 5899 | 87242 |
| 2007 | 218565 | 9425 | 89987 |
| 2008 | 222760 | 11281 | 94513 |
| 2009 | 233433 | 12921 | 90374 |
| 2010 | 244488 | 15049 | 100047 |
| 2011 | 221441 | 13333 | 87886 |
| 2012 | 221920 | 22125 | 93780 |
| 2013 | 226133 | 20578 | 99600 |
| 2014 | 204486 | 27951 | 88186 |
| 2015 | 219110 | 30543 | 104460 |
| 2016 | 198993 | 31371 | 90262 |
| 2017 | 188242 | 29790 | 87338 |
| 2018 | 172675 | 30626 | 83881 |
| 2019 | 157787 | 33305 | 72869 |
| 2020 | 152175 | 41742 | 78711 |
| 2021 | 108267 | 38232 | 53796 |
| 2022 | 63102 | 28817 | 31785 |
| 2023 | 29346 | 13657 | 14574 |
| 2024 | 6509 | 3086 | 3487 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 79836 | 271 | 12896 |
| 1997 | 105409 | 716 | 14812 |
| 1998 | 109800 | 368 | 16006 |
| 1999 | 119160 | 257 | 16388 |
| 2000 | 135889 | 530 | 23126 |
| 2001 | 136846 | 636 | 21258 |
| 2002 | 155326 | 1619 | 20250 |
| 2003 | 164366 | 1260 | 23450 |
| 2004 | 179820 | 3062 | 24905 |
| 2005 | 173704 | 1699 | 23613 |
| 2006 | 171760 | 2732 | 25001 |
| 2007 | 164902 | 4916 | 27255 |
| 2008 | 172972 | 5812 | 28043 |
| 2009 | 179912 | 7027 | 26035 |
| 2010 | 180396 | 7105 | 27707 |
| 2011 | 168945 | 8295 | 26909 |
| 2012 | 166672 | 12458 | 25916 |
| 2013 | 172684 | 13241 | 29530 |
| 2014 | 158936 | 17625 | 25863 |
| 2015 | 157191 | 19944 | 28632 |
| 2016 | 141140 | 21146 | 25125 |
| 2017 | 128055 | 24707 | 22460 |
| 2018 | 119135 | 26559 | 21988 |
| 2019 | 102975 | 29506 | 18733 |
| 2020 | 96527 | 34147 | 19859 |
| 2021 | 78910 | 38832 | 15071 |
| 2022 | 48279 | 38834 | 9433 |
| 2023 | 23536 | 18235 | 4902 |
| 2024 | 5973 | 4235 | 1493 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 10.51 | 31.75 | 13.97 |
| 1997 | 5.55 | 25.00 | 9.54 |
| 1998 | 7.83 | 64.71 | 10.06 |
| 1999 | 6.15 | 63.41 | 9.54 |
| 2000 | 6.96 | 64.86 | 10.13 |
| 2001 | 6.83 | 54.41 | 11.02 |
| 2002 | 8.91 | 46.61 | 12.48 |
| 2003 | 9.27 | 34.65 | 14.55 |
| 2004 | 10.98 | 52.41 | 17.82 |
| 2005 | 11.81 | 34.86 | 18.74 |
| 2006 | 12.84 | 21.97 | 17.27 |
| 2007 | 16.15 | 21.13 | 19.66 |
| 2008 | 19.37 | 27.00 | 23.02 |
| 2009 | 14.64 | 30.85 | 22.46 |
| 2010 | 13.43 | 30.51 | 21.27 |
| 2011 | 13.33 | 30.97 | 21.25 |
| 2012 | 13.93 | 34.83 | 22.72 |
| 2013 | 14.95 | 32.68 | 24.93 |
| 2014 | 15.74 | 30.72 | 27.37 |
| 2015 | 16.76 | 31.98 | 30.26 |
| 2016 | 18.52 | 27.04 | 32.57 |
| 2017 | 19.45 | 31.36 | 33.53 |
| 2018 | 20.85 | 32.21 | 35.80 |
| 2019 | 23.09 | 26.08 | 39.53 |
| 2020 | 23.47 | 25.50 | 45.32 |
| 2021 | 24.61 | 21.15 | 47.28 |
| 2022 | 27.31 | 19.98 | 48.98 |
| 2023 | 26.31 | 18.20 | 49.66 |
| 2024 | 25.84 | 16.80 | 49.29 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 19.90 | 28.57 | 18.45 |
| 1997 | 18.44 | 26.56 | 19.80 |
| 1998 | 20.45 | 17.65 | 21.41 |
| 1999 | 19.46 | 24.39 | 19.78 |
| 2000 | 22.23 | 29.73 | 22.77 |
| 2001 | 19.19 | 29.41 | 23.68 |
| 2002 | 21.35 | 41.53 | 23.80 |
| 2003 | 24.86 | 32.28 | 26.92 |
| 2004 | 23.12 | 39.16 | 27.83 |
| 2005 | 23.04 | 27.06 | 27.44 |
| 2006 | 24.00 | 28.30 | 25.64 |
| 2007 | 26.60 | 26.48 | 27.82 |
| 2008 | 29.64 | 32.63 | 29.51 |
| 2009 | 33.34 | 30.33 | 32.92 |
| 2010 | 34.35 | 33.13 | 30.96 |
| 2011 | 35.14 | 36.20 | 32.88 |
| 2012 | 36.37 | 37.60 | 33.25 |
| 2013 | 40.04 | 39.37 | 35.68 |
| 2014 | 39.65 | 40.18 | 39.24 |
| 2015 | 38.31 | 45.02 | 46.74 |
| 2016 | 39.86 | 42.94 | 53.99 |
| 2017 | 41.98 | 39.98 | 57.53 |
| 2018 | 44.76 | 43.31 | 61.02 |
| 2019 | 47.78 | 42.96 | 64.61 |
| 2020 | 49.98 | 52.77 | 68.40 |
| 2021 | 52.43 | 64.05 | 71.06 |
| 2022 | 53.72 | 67.44 | 72.46 |
| 2023 | 51.59 | 60.74 | 71.82 |
| 2024 | 38.80 | 53.24 | 63.60 |