| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 9675 | 88 | 3808 |
| 1997 | 9743 | 81 | 4032 |
| 1998 | 9894 | 150 | 4316 |
| 1999 | 10215 | 145 | 4389 |
| 2000 | 10641 | 144 | 4817 |
| 2001 | 10769 | 144 | 4406 |
| 2002 | 12338 | 199 | 4847 |
| 2003 | 12749 | 203 | 4861 |
| 2004 | 13233 | 551 | 5125 |
| 2005 | 14271 | 523 | 5731 |
| 2006 | 14987 | 1109 | 6179 |
| 2007 | 15366 | 1333 | 6750 |
| 2008 | 15909 | 1157 | 6611 |
| 2009 | 21531 | 1339 | 8369 |
| 2010 | 22888 | 1566 | 9409 |
| 2011 | 23702 | 1841 | 10211 |
| 2012 | 23383 | 1969 | 10388 |
| 2013 | 24220 | 2157 | 11338 |
| 2014 | 26010 | 2364 | 11152 |
| 2015 | 26717 | 2441 | 11725 |
| 2016 | 27232 | 2305 | 12634 |
| 2017 | 27745 | 2795 | 12851 |
| 2018 | 28333 | 3113 | 13543 |
| 2019 | 27887 | 3928 | 13258 |
| 2020 | 27826 | 4376 | 13425 |
| 2021 | 28206 | 5299 | 13257 |
| 2022 | 27844 | 5640 | 12861 |
| 2023 | 26953 | 6702 | 13184 |
| 2024 | 25944 | 8613 | 13340 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 9164 | 85 | 2907 |
| 1997 | 9230 | 80 | 3341 |
| 1998 | 9329 | 148 | 3942 |
| 1999 | 9593 | 145 | 3413 |
| 2000 | 10016 | 140 | 3848 |
| 2001 | 10250 | 141 | 3644 |
| 2002 | 11689 | 194 | 4220 |
| 2003 | 12022 | 198 | 4208 |
| 2004 | 12417 | 544 | 4527 |
| 2005 | 13288 | 511 | 5049 |
| 2006 | 13853 | 1096 | 5638 |
| 2007 | 14135 | 1319 | 6127 |
| 2008 | 14680 | 1134 | 6062 |
| 2009 | 19616 | 1309 | 7526 |
| 2010 | 20773 | 1520 | 8404 |
| 2011 | 21465 | 1782 | 9095 |
| 2012 | 21346 | 1900 | 9394 |
| 2013 | 22132 | 2098 | 9931 |
| 2014 | 23516 | 2282 | 9802 |
| 2015 | 23926 | 2324 | 10111 |
| 2016 | 23978 | 2201 | 10732 |
| 2017 | 24328 | 2666 | 11087 |
| 2018 | 24779 | 2952 | 11570 |
| 2019 | 24666 | 3662 | 11547 |
| 2020 | 24754 | 4126 | 11513 |
| 2021 | 25292 | 5064 | 11541 |
| 2022 | 24630 | 5337 | 11212 |
| 2023 | 23889 | 6411 | 11528 |
| 2024 | 23585 | 8349 | 11882 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 511 | 3 | 901 |
| 1997 | 513 | 1 | 691 |
| 1998 | 565 | 2 | 374 |
| 1999 | 622 | 0 | 976 |
| 2000 | 625 | 4 | 969 |
| 2001 | 519 | 3 | 762 |
| 2002 | 649 | 5 | 627 |
| 2003 | 727 | 5 | 653 |
| 2004 | 816 | 7 | 598 |
| 2005 | 983 | 12 | 682 |
| 2006 | 1134 | 13 | 541 |
| 2007 | 1231 | 14 | 623 |
| 2008 | 1229 | 23 | 549 |
| 2009 | 1915 | 30 | 843 |
| 2010 | 2115 | 46 | 1005 |
| 2011 | 2237 | 59 | 1116 |
| 2012 | 2037 | 69 | 994 |
| 2013 | 2088 | 59 | 1407 |
| 2014 | 2494 | 82 | 1350 |
| 2015 | 2791 | 117 | 1614 |
| 2016 | 3254 | 104 | 1902 |
| 2017 | 3417 | 129 | 1764 |
| 2018 | 3554 | 161 | 1973 |
| 2019 | 3221 | 266 | 1711 |
| 2020 | 3072 | 250 | 1912 |
| 2021 | 2914 | 235 | 1716 |
| 2022 | 3214 | 303 | 1649 |
| 2023 | 3064 | 291 | 1656 |
| 2024 | 2359 | 264 | 1458 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 8188 | 74 | 2629 |
| 1997 | 8508 | 61 | 2916 |
| 1998 | 8609 | 127 | 3187 |
| 1999 | 8872 | 93 | 3176 |
| 2000 | 9310 | 110 | 3736 |
| 2001 | 9478 | 104 | 3392 |
| 2002 | 10606 | 157 | 3964 |
| 2003 | 11067 | 158 | 4056 |
| 2004 | 11456 | 369 | 4403 |
| 2005 | 12384 | 320 | 4868 |
| 2006 | 13006 | 733 | 5353 |
| 2007 | 13207 | 917 | 5870 |
| 2008 | 13697 | 734 | 5699 |
| 2009 | 17524 | 988 | 6976 |
| 2010 | 18426 | 1146 | 7666 |
| 2011 | 19114 | 1263 | 8278 |
| 2012 | 18824 | 1396 | 8588 |
| 2013 | 19208 | 1480 | 9225 |
| 2014 | 20386 | 1663 | 8920 |
| 2015 | 20593 | 1719 | 9061 |
| 2016 | 20458 | 1669 | 9649 |
| 2017 | 20580 | 2036 | 9977 |
| 2018 | 20572 | 2247 | 10238 |
| 2019 | 19769 | 2707 | 9887 |
| 2020 | 19108 | 3138 | 9678 |
| 2021 | 17858 | 3539 | 9162 |
| 2022 | 15033 | 3523 | 7773 |
| 2023 | 11309 | 3592 | 6258 |
| 2024 | 5546 | 2260 | 3265 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 1487 | 14 | 1179 |
| 1997 | 1235 | 20 | 1116 |
| 1998 | 1285 | 23 | 1129 |
| 1999 | 1343 | 52 | 1213 |
| 2000 | 1331 | 34 | 1081 |
| 2001 | 1291 | 40 | 1014 |
| 2002 | 1732 | 42 | 883 |
| 2003 | 1682 | 45 | 805 |
| 2004 | 1777 | 182 | 722 |
| 2005 | 1887 | 203 | 863 |
| 2006 | 1981 | 376 | 826 |
| 2007 | 2159 | 416 | 880 |
| 2008 | 2212 | 423 | 912 |
| 2009 | 4007 | 351 | 1393 |
| 2010 | 4462 | 420 | 1743 |
| 2011 | 4588 | 578 | 1933 |
| 2012 | 4559 | 573 | 1800 |
| 2013 | 5012 | 677 | 2113 |
| 2014 | 5624 | 701 | 2232 |
| 2015 | 6124 | 722 | 2664 |
| 2016 | 6774 | 636 | 2985 |
| 2017 | 7165 | 759 | 2874 |
| 2018 | 7761 | 866 | 3305 |
| 2019 | 8118 | 1221 | 3371 |
| 2020 | 8718 | 1238 | 3747 |
| 2021 | 10348 | 1760 | 4095 |
| 2022 | 12811 | 2117 | 5088 |
| 2023 | 15644 | 3110 | 6926 |
| 2024 | 20398 | 6353 | 10075 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 675347 | 6390 | 113318 |
| 1997 | 729249 | 6334 | 118833 |
| 1998 | 722947 | 5647 | 140081 |
| 1999 | 772186 | 6404 | 146875 |
| 2000 | 776975 | 7417 | 190444 |
| 2001 | 826816 | 6583 | 156936 |
| 2002 | 906597 | 10190 | 184432 |
| 2003 | 859903 | 12955 | 211492 |
| 2004 | 917724 | 21898 | 336074 |
| 2005 | 844905 | 24069 | 254590 |
| 2006 | 838015 | 28858 | 272848 |
| 2007 | 792793 | 32785 | 277082 |
| 2008 | 860527 | 35773 | 267626 |
| 2009 | 854728 | 60304 | 290896 |
| 2010 | 834596 | 54747 | 283706 |
| 2011 | 791933 | 52876 | 252063 |
| 2012 | 675671 | 55560 | 262774 |
| 2013 | 711520 | 81558 | 254694 |
| 2014 | 639870 | 69882 | 235220 |
| 2015 | 619656 | 65836 | 227491 |
| 2016 | 540350 | 66998 | 215332 |
| 2017 | 478677 | 60101 | 191733 |
| 2018 | 449681 | 81104 | 193921 |
| 2019 | 351227 | 69098 | 146595 |
| 2020 | 341236 | 96200 | 157118 |
| 2021 | 220323 | 55174 | 107001 |
| 2022 | 128101 | 38988 | 60865 |
| 2023 | 58608 | 24192 | 29433 |
| 2024 | 14079 | 7597 | 8360 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 352733 | 3672 | 85326 |
| 1997 | 389433 | 2945 | 88179 |
| 1998 | 395226 | 3613 | 104078 |
| 1999 | 430192 | 3904 | 109150 |
| 2000 | 431414 | 3125 | 145874 |
| 2001 | 467438 | 2375 | 115657 |
| 2002 | 514976 | 6895 | 135421 |
| 2003 | 482024 | 8223 | 160732 |
| 2004 | 519428 | 12400 | 269923 |
| 2005 | 476200 | 14512 | 190565 |
| 2006 | 472863 | 14031 | 204905 |
| 2007 | 451303 | 18483 | 207265 |
| 2008 | 501297 | 18643 | 201244 |
| 2009 | 485807 | 35422 | 219672 |
| 2010 | 477611 | 29449 | 211963 |
| 2011 | 466502 | 30376 | 187481 |
| 2012 | 388647 | 30931 | 196750 |
| 2013 | 411415 | 51517 | 189207 |
| 2014 | 371138 | 36258 | 175176 |
| 2015 | 366632 | 29876 | 169826 |
| 2016 | 322005 | 32902 | 162694 |
| 2017 | 288176 | 27919 | 142743 |
| 2018 | 271964 | 39106 | 146856 |
| 2019 | 208980 | 30758 | 108380 |
| 2020 | 209255 | 54435 | 121198 |
| 2021 | 133685 | 23259 | 79930 |
| 2022 | 75477 | 15499 | 44891 |
| 2023 | 34871 | 9672 | 21147 |
| 2024 | 7917 | 2764 | 5696 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 322614 | 2718 | 27992 |
| 1997 | 339816 | 3389 | 30654 |
| 1998 | 327721 | 2034 | 36003 |
| 1999 | 341994 | 2500 | 37725 |
| 2000 | 345561 | 4292 | 44570 |
| 2001 | 359378 | 4208 | 41279 |
| 2002 | 391621 | 3295 | 49011 |
| 2003 | 377879 | 4732 | 50760 |
| 2004 | 398296 | 9498 | 66151 |
| 2005 | 368705 | 9557 | 64025 |
| 2006 | 365152 | 14827 | 67943 |
| 2007 | 341490 | 14302 | 69817 |
| 2008 | 359230 | 17130 | 66382 |
| 2009 | 368921 | 24882 | 71224 |
| 2010 | 356985 | 25298 | 71743 |
| 2011 | 325431 | 22500 | 64582 |
| 2012 | 287024 | 24629 | 66024 |
| 2013 | 300105 | 30041 | 65487 |
| 2014 | 268732 | 33624 | 60044 |
| 2015 | 253024 | 35960 | 57665 |
| 2016 | 218345 | 34096 | 52638 |
| 2017 | 190501 | 32182 | 48990 |
| 2018 | 177717 | 41998 | 47065 |
| 2019 | 142247 | 38340 | 38215 |
| 2020 | 131981 | 41765 | 35920 |
| 2021 | 86638 | 31915 | 27071 |
| 2022 | 52624 | 23489 | 15974 |
| 2023 | 23737 | 14520 | 8286 |
| 2024 | 6162 | 4833 | 2664 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 13.70 | 40.91 | 13.21 |
| 1997 | 9.63 | 49.38 | 10.64 |
| 1998 | 11.71 | 31.33 | 12.35 |
| 1999 | 10.41 | 26.21 | 10.94 |
| 2000 | 9.52 | 34.72 | 10.75 |
| 2001 | 7.88 | 24.31 | 9.74 |
| 2002 | 9.30 | 29.15 | 12.34 |
| 2003 | 12.51 | 48.77 | 16.93 |
| 2004 | 14.25 | 25.05 | 18.71 |
| 2005 | 14.41 | 26.20 | 19.33 |
| 2006 | 14.55 | 17.85 | 19.31 |
| 2007 | 15.57 | 20.18 | 19.63 |
| 2008 | 19.58 | 23.51 | 22.95 |
| 2009 | 13.00 | 21.14 | 19.00 |
| 2010 | 11.74 | 21.46 | 17.90 |
| 2011 | 11.92 | 21.24 | 17.83 |
| 2012 | 12.48 | 23.36 | 18.07 |
| 2013 | 12.84 | 23.97 | 18.51 |
| 2014 | 13.62 | 22.67 | 21.25 |
| 2015 | 13.34 | 25.48 | 21.06 |
| 2016 | 13.68 | 29.24 | 21.40 |
| 2017 | 14.49 | 28.19 | 22.61 |
| 2018 | 15.73 | 30.07 | 24.19 |
| 2019 | 15.91 | 30.19 | 24.14 |
| 2020 | 16.98 | 29.00 | 25.71 |
| 2021 | 17.85 | 26.76 | 28.14 |
| 2022 | 17.72 | 27.61 | 28.64 |
| 2023 | 18.68 | 26.80 | 30.22 |
| 2024 | 20.57 | 26.94 | 32.00 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 7.57 | 5.68 | 8.51 |
| 1997 | 8.64 | 11.11 | 10.42 |
| 1998 | 9.65 | 6.00 | 11.24 |
| 1999 | 9.36 | 13.10 | 10.37 |
| 2000 | 9.28 | 13.89 | 11.98 |
| 2001 | 10.20 | 15.28 | 14.37 |
| 2002 | 11.04 | 15.08 | 13.20 |
| 2003 | 11.99 | 14.29 | 16.75 |
| 2004 | 13.00 | 20.33 | 17.99 |
| 2005 | 13.64 | 23.71 | 18.13 |
| 2006 | 14.87 | 19.21 | 19.16 |
| 2007 | 15.20 | 14.85 | 21.57 |
| 2008 | 18.23 | 21.78 | 22.04 |
| 2009 | 19.85 | 26.21 | 22.97 |
| 2010 | 19.67 | 26.31 | 23.67 |
| 2011 | 20.18 | 34.27 | 24.25 |
| 2012 | 20.26 | 35.96 | 24.10 |
| 2013 | 20.48 | 30.64 | 27.45 |
| 2014 | 21.76 | 32.36 | 35.24 |
| 2015 | 23.50 | 33.55 | 41.40 |
| 2016 | 25.94 | 33.80 | 50.59 |
| 2017 | 26.62 | 32.95 | 58.27 |
| 2018 | 29.18 | 38.39 | 58.81 |
| 2019 | 31.49 | 44.68 | 60.20 |
| 2020 | 32.37 | 44.31 | 60.33 |
| 2021 | 32.94 | 42.73 | 65.51 |
| 2022 | 33.63 | 47.94 | 66.39 |
| 2023 | 36.17 | 50.73 | 70.15 |
| 2024 | 32.45 | 49.49 | 68.43 |