| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 21912 | 3591 | 4754 |
| 1997 | 21642 | 3325 | 4556 |
| 1998 | 22875 | 4948 | 4900 |
| 1999 | 23985 | 4314 | 5039 |
| 2000 | 23338 | 5366 | 5705 |
| 2001 | 24287 | 7213 | 5986 |
| 2002 | 26996 | 8229 | 6380 |
| 2003 | 28373 | 8684 | 6893 |
| 2004 | 29749 | 11484 | 7351 |
| 2005 | 29680 | 17873 | 7784 |
| 2006 | 32081 | 19722 | 8557 |
| 2007 | 31791 | 24996 | 8880 |
| 2008 | 31537 | 23287 | 9143 |
| 2009 | 33139 | 29863 | 9603 |
| 2010 | 34447 | 30185 | 9619 |
| 2011 | 34611 | 32210 | 10049 |
| 2012 | 34604 | 36440 | 9975 |
| 2013 | 35050 | 37446 | 10676 |
| 2014 | 35961 | 39790 | 10995 |
| 2015 | 38020 | 42159 | 11750 |
| 2016 | 41552 | 52833 | 13395 |
| 2017 | 41762 | 60486 | 13723 |
| 2018 | 43114 | 64141 | 14048 |
| 2019 | 43793 | 74219 | 14243 |
| 2020 | 43981 | 75535 | 14233 |
| 2021 | 42822 | 83329 | 14473 |
| 2022 | 44955 | 105672 | 15017 |
| 2023 | 44336 | 114056 | 14799 |
| 2024 | 39287 | 106190 | 14152 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 21512 | 3556 | 4678 |
| 1997 | 21572 | 3322 | 4529 |
| 1998 | 22803 | 4948 | 4873 |
| 1999 | 23882 | 4310 | 4999 |
| 2000 | 23220 | 5363 | 5668 |
| 2001 | 24050 | 7202 | 5894 |
| 2002 | 26694 | 8207 | 6251 |
| 2003 | 28092 | 8655 | 6779 |
| 2004 | 29517 | 11464 | 7233 |
| 2005 | 29247 | 17839 | 7631 |
| 2006 | 31388 | 19667 | 8326 |
| 2007 | 30978 | 24910 | 8645 |
| 2008 | 30853 | 23232 | 8865 |
| 2009 | 32092 | 29753 | 9304 |
| 2010 | 33407 | 30007 | 9296 |
| 2011 | 33398 | 32009 | 9651 |
| 2012 | 33502 | 36204 | 9572 |
| 2013 | 33772 | 37148 | 10256 |
| 2014 | 34656 | 39427 | 10605 |
| 2015 | 36546 | 41767 | 11354 |
| 2016 | 39624 | 52199 | 12738 |
| 2017 | 39540 | 59854 | 13035 |
| 2018 | 40862 | 63488 | 13316 |
| 2019 | 41550 | 73391 | 13512 |
| 2020 | 41828 | 74752 | 13454 |
| 2021 | 40477 | 82518 | 13683 |
| 2022 | 42633 | 104278 | 14160 |
| 2023 | 42212 | 112643 | 14054 |
| 2024 | 37583 | 104928 | 13424 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 400 | 35 | 76 |
| 1997 | 70 | 3 | 27 |
| 1998 | 72 | 0 | 27 |
| 1999 | 103 | 4 | 40 |
| 2000 | 118 | 3 | 37 |
| 2001 | 237 | 11 | 92 |
| 2002 | 302 | 22 | 129 |
| 2003 | 281 | 29 | 114 |
| 2004 | 232 | 20 | 118 |
| 2005 | 433 | 34 | 153 |
| 2006 | 693 | 55 | 231 |
| 2007 | 813 | 86 | 235 |
| 2008 | 684 | 55 | 278 |
| 2009 | 1047 | 110 | 299 |
| 2010 | 1040 | 178 | 323 |
| 2011 | 1213 | 201 | 398 |
| 2012 | 1102 | 236 | 403 |
| 2013 | 1278 | 298 | 420 |
| 2014 | 1305 | 363 | 390 |
| 2015 | 1474 | 392 | 396 |
| 2016 | 1928 | 634 | 657 |
| 2017 | 2222 | 632 | 688 |
| 2018 | 2252 | 653 | 732 |
| 2019 | 2243 | 828 | 731 |
| 2020 | 2153 | 783 | 779 |
| 2021 | 2345 | 811 | 790 |
| 2022 | 2322 | 1394 | 857 |
| 2023 | 2124 | 1413 | 745 |
| 2024 | 1704 | 1262 | 728 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 18201 | 2189 | 3966 |
| 1997 | 18368 | 2369 | 3915 |
| 1998 | 19300 | 3123 | 4229 |
| 1999 | 20279 | 3156 | 4466 |
| 2000 | 20129 | 3878 | 5021 |
| 2001 | 20705 | 5060 | 5191 |
| 2002 | 23153 | 5891 | 5621 |
| 2003 | 24495 | 6583 | 6003 |
| 2004 | 25809 | 9063 | 6481 |
| 2005 | 25556 | 13128 | 6756 |
| 2006 | 27458 | 14970 | 7519 |
| 2007 | 27514 | 19014 | 7803 |
| 2008 | 27533 | 18178 | 8068 |
| 2009 | 28681 | 22395 | 8489 |
| 2010 | 29648 | 23272 | 8477 |
| 2011 | 29613 | 24061 | 8738 |
| 2012 | 30073 | 27712 | 8785 |
| 2013 | 30233 | 29331 | 9412 |
| 2014 | 30982 | 31966 | 9631 |
| 2015 | 32450 | 34049 | 10267 |
| 2016 | 35575 | 41871 | 11704 |
| 2017 | 35899 | 48627 | 11990 |
| 2018 | 36946 | 51545 | 12345 |
| 2019 | 36998 | 59188 | 12462 |
| 2020 | 37142 | 59931 | 12408 |
| 2021 | 34707 | 62144 | 12195 |
| 2022 | 34026 | 71066 | 11873 |
| 2023 | 27385 | 60407 | 9683 |
| 2024 | 10994 | 29651 | 4727 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 3711 | 1402 | 788 |
| 1997 | 3274 | 956 | 641 |
| 1998 | 3575 | 1825 | 671 |
| 1999 | 3706 | 1158 | 573 |
| 2000 | 3209 | 1488 | 684 |
| 2001 | 3582 | 2153 | 795 |
| 2002 | 3843 | 2338 | 759 |
| 2003 | 3878 | 2101 | 890 |
| 2004 | 3940 | 2421 | 870 |
| 2005 | 4124 | 4745 | 1028 |
| 2006 | 4623 | 4752 | 1038 |
| 2007 | 4277 | 5982 | 1077 |
| 2008 | 4004 | 5109 | 1075 |
| 2009 | 4458 | 7468 | 1114 |
| 2010 | 4799 | 6913 | 1142 |
| 2011 | 4998 | 8149 | 1311 |
| 2012 | 4531 | 8728 | 1190 |
| 2013 | 4817 | 8115 | 1264 |
| 2014 | 4979 | 7824 | 1364 |
| 2015 | 5570 | 8110 | 1483 |
| 2016 | 5977 | 10962 | 1691 |
| 2017 | 5863 | 11859 | 1733 |
| 2018 | 6168 | 12596 | 1703 |
| 2019 | 6795 | 15031 | 1781 |
| 2020 | 6839 | 15604 | 1825 |
| 2021 | 8115 | 21185 | 2278 |
| 2022 | 10929 | 34606 | 3144 |
| 2023 | 16951 | 53649 | 5116 |
| 2024 | 28293 | 76539 | 9425 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 634926 | 35342 | 127595 |
| 1997 | 657401 | 41974 | 130149 |
| 1998 | 767947 | 46183 | 172343 |
| 1999 | 813268 | 56205 | 153122 |
| 2000 | 782915 | 66070 | 177805 |
| 2001 | 824568 | 82280 | 185000 |
| 2002 | 900493 | 106707 | 226825 |
| 2003 | 984930 | 132492 | 202074 |
| 2004 | 965353 | 169007 | 213444 |
| 2005 | 887588 | 211538 | 217172 |
| 2006 | 956736 | 230328 | 241138 |
| 2007 | 932481 | 308479 | 276844 |
| 2008 | 929378 | 314118 | 271700 |
| 2009 | 992626 | 406347 | 338941 |
| 2010 | 978717 | 392537 | 262196 |
| 2011 | 983796 | 398073 | 292015 |
| 2012 | 814667 | 467836 | 236794 |
| 2013 | 814041 | 472297 | 237282 |
| 2014 | 796826 | 535629 | 242862 |
| 2015 | 743382 | 575314 | 240164 |
| 2016 | 802841 | 674631 | 296573 |
| 2017 | 739870 | 722248 | 268707 |
| 2018 | 734912 | 821331 | 275420 |
| 2019 | 613712 | 835968 | 221677 |
| 2020 | 559828 | 824063 | 208192 |
| 2021 | 408209 | 680368 | 156343 |
| 2022 | 272498 | 607506 | 110902 |
| 2023 | 137419 | 349418 | 60020 |
| 2024 | 27050 | 87761 | 13333 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 408172 | 17648 | 101846 |
| 1997 | 432676 | 20166 | 104327 |
| 1998 | 504899 | 21042 | 139251 |
| 1999 | 526344 | 25439 | 122852 |
| 2000 | 516545 | 29119 | 141853 |
| 2001 | 538874 | 33496 | 150238 |
| 2002 | 592546 | 42794 | 183364 |
| 2003 | 650677 | 54995 | 163368 |
| 2004 | 626780 | 70003 | 171210 |
| 2005 | 573159 | 82368 | 173411 |
| 2006 | 614596 | 91546 | 191781 |
| 2007 | 603454 | 126555 | 224436 |
| 2008 | 586665 | 126205 | 215137 |
| 2009 | 636270 | 174410 | 274283 |
| 2010 | 619533 | 153750 | 205740 |
| 2011 | 624100 | 152607 | 232999 |
| 2012 | 506098 | 174504 | 186242 |
| 2013 | 511205 | 167559 | 184092 |
| 2014 | 498023 | 192097 | 188959 |
| 2015 | 464743 | 198488 | 187159 |
| 2016 | 513703 | 246015 | 235279 |
| 2017 | 479317 | 251679 | 212710 |
| 2018 | 481249 | 279892 | 221707 |
| 2019 | 399437 | 285290 | 176293 |
| 2020 | 369202 | 272973 | 166143 |
| 2021 | 263927 | 204660 | 124368 |
| 2022 | 176357 | 170668 | 88103 |
| 2023 | 87931 | 94171 | 47183 |
| 2024 | 16753 | 22947 | 10005 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 226754 | 17694 | 25749 |
| 1997 | 224725 | 21808 | 25822 |
| 1998 | 263048 | 25141 | 33092 |
| 1999 | 286924 | 30766 | 30270 |
| 2000 | 266370 | 36951 | 35952 |
| 2001 | 285694 | 48784 | 34762 |
| 2002 | 307947 | 63913 | 43461 |
| 2003 | 334253 | 77497 | 38706 |
| 2004 | 338573 | 99004 | 42234 |
| 2005 | 314429 | 129170 | 43761 |
| 2006 | 342140 | 138782 | 49357 |
| 2007 | 329027 | 181924 | 52408 |
| 2008 | 342713 | 187913 | 56563 |
| 2009 | 356356 | 231937 | 64658 |
| 2010 | 359184 | 238787 | 56456 |
| 2011 | 359696 | 245466 | 59016 |
| 2012 | 308569 | 293332 | 50552 |
| 2013 | 302836 | 304738 | 53190 |
| 2014 | 298803 | 343532 | 53903 |
| 2015 | 278639 | 376826 | 53005 |
| 2016 | 289138 | 428616 | 61294 |
| 2017 | 260553 | 470569 | 55997 |
| 2018 | 253663 | 541439 | 53713 |
| 2019 | 214275 | 550678 | 45384 |
| 2020 | 190626 | 551090 | 42049 |
| 2021 | 144282 | 475708 | 31975 |
| 2022 | 96141 | 436838 | 22799 |
| 2023 | 49488 | 255247 | 12837 |
| 2024 | 10297 | 64814 | 3328 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 21.06 | 16.60 | 30.84 |
| 1997 | 22.11 | 20.99 | 31.83 |
| 1998 | 22.11 | 17.97 | 33.18 |
| 1999 | 19.75 | 20.38 | 31.57 |
| 2000 | 22.88 | 19.34 | 32.73 |
| 2001 | 24.90 | 17.15 | 35.18 |
| 2002 | 25.52 | 17.77 | 36.83 |
| 2003 | 28.45 | 22.81 | 40.13 |
| 2004 | 28.58 | 21.06 | 42.50 |
| 2005 | 29.66 | 16.74 | 43.14 |
| 2006 | 30.67 | 17.35 | 44.85 |
| 2007 | 33.06 | 16.59 | 46.68 |
| 2008 | 34.77 | 17.99 | 48.04 |
| 2009 | 33.56 | 16.93 | 48.71 |
| 2010 | 33.48 | 17.48 | 50.35 |
| 2011 | 34.55 | 17.52 | 51.46 |
| 2012 | 37.26 | 18.14 | 53.44 |
| 2013 | 38.34 | 19.93 | 55.93 |
| 2014 | 39.25 | 21.13 | 57.04 |
| 2015 | 39.05 | 22.28 | 57.08 |
| 2016 | 40.51 | 21.58 | 59.40 |
| 2017 | 41.53 | 21.19 | 61.31 |
| 2018 | 42.79 | 22.82 | 62.81 |
| 2019 | 43.45 | 22.43 | 64.85 |
| 2020 | 44.00 | 23.31 | 66.28 |
| 2021 | 43.37 | 21.02 | 67.23 |
| 2022 | 43.63 | 19.16 | 67.45 |
| 2023 | 43.10 | 17.33 | 67.53 |
| 2024 | 46.28 | 18.79 | 71.17 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 24.48 | 19.94 | 20.24 |
| 1997 | 23.08 | 19.07 | 20.74 |
| 1998 | 22.33 | 16.57 | 21.57 |
| 1999 | 24.44 | 20.31 | 25.02 |
| 2000 | 25.58 | 17.78 | 25.59 |
| 2001 | 24.10 | 17.93 | 24.01 |
| 2002 | 24.75 | 17.32 | 27.79 |
| 2003 | 26.38 | 21.81 | 28.19 |
| 2004 | 26.94 | 20.04 | 28.15 |
| 2005 | 27.82 | 16.50 | 30.25 |
| 2006 | 28.76 | 19.14 | 31.52 |
| 2007 | 32.26 | 19.35 | 35.44 |
| 2008 | 33.25 | 22.03 | 36.38 |
| 2009 | 36.32 | 21.03 | 40.25 |
| 2010 | 35.58 | 20.16 | 39.73 |
| 2011 | 37.23 | 22.31 | 40.24 |
| 2012 | 37.31 | 25.93 | 41.60 |
| 2013 | 39.29 | 34.08 | 44.77 |
| 2014 | 40.26 | 33.91 | 48.61 |
| 2015 | 41.83 | 31.70 | 54.66 |
| 2016 | 41.45 | 24.79 | 57.39 |
| 2017 | 42.48 | 23.64 | 60.80 |
| 2018 | 44.57 | 26.11 | 62.81 |
| 2019 | 47.15 | 26.44 | 63.88 |
| 2020 | 50.64 | 30.58 | 67.06 |
| 2021 | 52.36 | 29.25 | 68.48 |
| 2022 | 51.16 | 32.98 | 66.48 |
| 2023 | 50.31 | 26.03 | 65.73 |
| 2024 | 46.83 | 30.49 | 60.43 |