| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 7394 | 1321 | 1383 |
| 1997 | 7372 | 1901 | 1471 |
| 1998 | 6683 | 1969 | 1231 |
| 1999 | 6222 | 2652 | 1445 |
| 2000 | 7823 | 3380 | 1551 |
| 2001 | 6837 | 3093 | 1616 |
| 2002 | 6319 | 3295 | 1520 |
| 2003 | 7187 | 3174 | 1492 |
| 2004 | 8939 | 5340 | 1624 |
| 2005 | 9202 | 8885 | 1917 |
| 2006 | 9911 | 8821 | 1891 |
| 2007 | 10230 | 10721 | 2382 |
| 2008 | 11234 | 11814 | 2384 |
| 2009 | 13601 | 15237 | 3148 |
| 2010 | 13510 | 16935 | 2931 |
| 2011 | 14961 | 16904 | 3173 |
| 2012 | 14511 | 19346 | 3120 |
| 2013 | 16955 | 21868 | 4010 |
| 2014 | 19130 | 25628 | 4340 |
| 2015 | 21450 | 28928 | 5192 |
| 2016 | 23415 | 34133 | 6140 |
| 2017 | 24280 | 37969 | 7123 |
| 2018 | 24469 | 44266 | 7076 |
| 2019 | 23283 | 56463 | 7651 |
| 2020 | 21713 | 59578 | 7558 |
| 2021 | 21385 | 67841 | 8415 |
| 2022 | 20094 | 79485 | 8206 |
| 2023 | 18553 | 79529 | 7849 |
| 2024 | 14781 | 75277 | 7165 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 7351 | 1316 | 1378 |
| 1997 | 6751 | 1899 | 1451 |
| 1998 | 6644 | 1968 | 1219 |
| 1999 | 6189 | 2650 | 1433 |
| 2000 | 7772 | 3377 | 1540 |
| 2001 | 6763 | 3086 | 1581 |
| 2002 | 6222 | 3288 | 1481 |
| 2003 | 7060 | 3167 | 1463 |
| 2004 | 8810 | 5335 | 1590 |
| 2005 | 9007 | 8880 | 1855 |
| 2006 | 9727 | 8805 | 1823 |
| 2007 | 10041 | 10710 | 2294 |
| 2008 | 11067 | 11803 | 2349 |
| 2009 | 13389 | 15222 | 3088 |
| 2010 | 13294 | 16896 | 2835 |
| 2011 | 14680 | 16872 | 3099 |
| 2012 | 14154 | 19294 | 3040 |
| 2013 | 16470 | 21797 | 3866 |
| 2014 | 18596 | 25506 | 4196 |
| 2015 | 20785 | 28843 | 5019 |
| 2016 | 22714 | 33959 | 5954 |
| 2017 | 23539 | 37697 | 6886 |
| 2018 | 23783 | 44031 | 6861 |
| 2019 | 22682 | 56096 | 7406 |
| 2020 | 21168 | 59273 | 7308 |
| 2021 | 20697 | 67441 | 8134 |
| 2022 | 19455 | 78987 | 7879 |
| 2023 | 17994 | 78983 | 7596 |
| 2024 | 14392 | 74879 | 6943 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 43 | 5 | 5 |
| 1997 | 621 | 2 | 20 |
| 1998 | 39 | 1 | 12 |
| 1999 | 33 | 2 | 12 |
| 2000 | 51 | 3 | 11 |
| 2001 | 74 | 7 | 35 |
| 2002 | 97 | 7 | 39 |
| 2003 | 127 | 7 | 29 |
| 2004 | 129 | 5 | 34 |
| 2005 | 195 | 5 | 62 |
| 2006 | 184 | 16 | 68 |
| 2007 | 189 | 11 | 88 |
| 2008 | 167 | 11 | 35 |
| 2009 | 212 | 15 | 60 |
| 2010 | 216 | 39 | 96 |
| 2011 | 281 | 32 | 74 |
| 2012 | 357 | 52 | 80 |
| 2013 | 485 | 71 | 144 |
| 2014 | 534 | 122 | 144 |
| 2015 | 665 | 85 | 173 |
| 2016 | 701 | 174 | 186 |
| 2017 | 741 | 272 | 237 |
| 2018 | 686 | 235 | 215 |
| 2019 | 601 | 367 | 245 |
| 2020 | 545 | 305 | 250 |
| 2021 | 688 | 400 | 281 |
| 2022 | 639 | 498 | 327 |
| 2023 | 559 | 546 | 253 |
| 2024 | 389 | 398 | 222 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 5478 | 671 | 1073 |
| 1997 | 5321 | 1108 | 1150 |
| 1998 | 4925 | 1136 | 1020 |
| 1999 | 4777 | 1508 | 1164 |
| 2000 | 5452 | 1921 | 1213 |
| 2001 | 5273 | 1985 | 1152 |
| 2002 | 4895 | 2341 | 1217 |
| 2003 | 5532 | 2251 | 1182 |
| 2004 | 5729 | 3804 | 1253 |
| 2005 | 6181 | 6540 | 1426 |
| 2006 | 6902 | 6576 | 1427 |
| 2007 | 7600 | 8347 | 1927 |
| 2008 | 8070 | 9703 | 2012 |
| 2009 | 10350 | 12347 | 2605 |
| 2010 | 10417 | 13912 | 2485 |
| 2011 | 11662 | 14230 | 2673 |
| 2012 | 11570 | 15856 | 2625 |
| 2013 | 13283 | 17858 | 3434 |
| 2014 | 14608 | 21329 | 3743 |
| 2015 | 16203 | 24166 | 4505 |
| 2016 | 18472 | 29636 | 5381 |
| 2017 | 19374 | 33552 | 6165 |
| 2018 | 20319 | 39553 | 6345 |
| 2019 | 19455 | 49210 | 6812 |
| 2020 | 18627 | 51994 | 6915 |
| 2021 | 18171 | 56465 | 7565 |
| 2022 | 16307 | 65505 | 7244 |
| 2023 | 13491 | 59906 | 6275 |
| 2024 | 6616 | 36294 | 3756 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 1916 | 650 | 310 |
| 1997 | 2051 | 793 | 321 |
| 1998 | 1758 | 833 | 211 |
| 1999 | 1445 | 1144 | 281 |
| 2000 | 2371 | 1459 | 338 |
| 2001 | 1564 | 1108 | 464 |
| 2002 | 1424 | 954 | 303 |
| 2003 | 1655 | 923 | 310 |
| 2004 | 3210 | 1536 | 371 |
| 2005 | 3021 | 2345 | 491 |
| 2006 | 3009 | 2245 | 464 |
| 2007 | 2630 | 2374 | 455 |
| 2008 | 3164 | 2111 | 372 |
| 2009 | 3251 | 2890 | 543 |
| 2010 | 3093 | 3023 | 446 |
| 2011 | 3299 | 2674 | 500 |
| 2012 | 2941 | 3490 | 495 |
| 2013 | 3672 | 4010 | 576 |
| 2014 | 4522 | 4299 | 597 |
| 2015 | 5247 | 4762 | 687 |
| 2016 | 4943 | 4497 | 759 |
| 2017 | 4906 | 4417 | 958 |
| 2018 | 4150 | 4713 | 731 |
| 2019 | 3828 | 7253 | 839 |
| 2020 | 3086 | 7584 | 643 |
| 2021 | 3214 | 11376 | 850 |
| 2022 | 3787 | 13980 | 962 |
| 2023 | 5062 | 19623 | 1574 |
| 2024 | 8165 | 38983 | 3409 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 139067 | 8144 | 29293 |
| 1997 | 147376 | 11031 | 37242 |
| 1998 | 152367 | 12772 | 30603 |
| 1999 | 154976 | 15142 | 36788 |
| 2000 | 169221 | 19037 | 43305 |
| 2001 | 170907 | 25343 | 43199 |
| 2002 | 180518 | 33310 | 51560 |
| 2003 | 197911 | 38374 | 42925 |
| 2004 | 206298 | 66396 | 53201 |
| 2005 | 239305 | 89001 | 57113 |
| 2006 | 250125 | 117157 | 69889 |
| 2007 | 328622 | 203817 | 90552 |
| 2008 | 331804 | 256027 | 95680 |
| 2009 | 388903 | 313185 | 99134 |
| 2010 | 419337 | 373991 | 118522 |
| 2011 | 529705 | 433866 | 117971 |
| 2012 | 502267 | 472327 | 127422 |
| 2013 | 541696 | 622967 | 152188 |
| 2014 | 584225 | 787332 | 180893 |
| 2015 | 585084 | 888708 | 188072 |
| 2016 | 666918 | 1006382 | 221467 |
| 2017 | 671731 | 1209617 | 255894 |
| 2018 | 707679 | 1436241 | 254197 |
| 2019 | 603648 | 1521785 | 236808 |
| 2020 | 526823 | 1447332 | 223813 |
| 2021 | 376511 | 1231749 | 196328 |
| 2022 | 227156 | 1006029 | 128318 |
| 2023 | 108533 | 541325 | 64698 |
| 2024 | 24519 | 141757 | 15654 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 93675 | 3865 | 24746 |
| 1997 | 100368 | 5812 | 31441 |
| 1998 | 103735 | 5916 | 25671 |
| 1999 | 107498 | 6059 | 29351 |
| 2000 | 118891 | 7328 | 37036 |
| 2001 | 119030 | 9838 | 37047 |
| 2002 | 127909 | 14115 | 44376 |
| 2003 | 136632 | 16824 | 35806 |
| 2004 | 145367 | 25125 | 44944 |
| 2005 | 169893 | 27987 | 46925 |
| 2006 | 174837 | 47365 | 58368 |
| 2007 | 232433 | 85971 | 75711 |
| 2008 | 235379 | 109951 | 79533 |
| 2009 | 269362 | 133981 | 82123 |
| 2010 | 297350 | 146928 | 99553 |
| 2011 | 378462 | 172681 | 99511 |
| 2012 | 357716 | 178374 | 106127 |
| 2013 | 387830 | 229247 | 125792 |
| 2014 | 426621 | 277845 | 151773 |
| 2015 | 429342 | 302423 | 156216 |
| 2016 | 489008 | 332080 | 185770 |
| 2017 | 503586 | 393819 | 217296 |
| 2018 | 539105 | 445295 | 214733 |
| 2019 | 467536 | 462106 | 201433 |
| 2020 | 409885 | 436077 | 190490 |
| 2021 | 289763 | 342524 | 167612 |
| 2022 | 175562 | 256034 | 109577 |
| 2023 | 82827 | 133123 | 55493 |
| 2024 | 18752 | 35640 | 13090 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 45392 | 4279 | 4547 |
| 1997 | 47008 | 5219 | 5801 |
| 1998 | 48632 | 6856 | 4932 |
| 1999 | 47478 | 9083 | 7437 |
| 2000 | 50330 | 11709 | 6269 |
| 2001 | 51877 | 15505 | 6152 |
| 2002 | 52609 | 19195 | 7184 |
| 2003 | 61279 | 21550 | 7119 |
| 2004 | 60931 | 41271 | 8257 |
| 2005 | 69412 | 61014 | 10188 |
| 2006 | 75288 | 69792 | 11521 |
| 2007 | 96189 | 117846 | 14841 |
| 2008 | 96425 | 146076 | 16147 |
| 2009 | 119541 | 179204 | 17011 |
| 2010 | 121987 | 227063 | 18969 |
| 2011 | 151243 | 261185 | 18460 |
| 2012 | 144551 | 293953 | 21295 |
| 2013 | 153866 | 393720 | 26396 |
| 2014 | 157604 | 509487 | 29120 |
| 2015 | 155742 | 586285 | 31856 |
| 2016 | 177910 | 674302 | 35697 |
| 2017 | 168145 | 815798 | 38598 |
| 2018 | 168574 | 990946 | 39464 |
| 2019 | 136112 | 1059679 | 35375 |
| 2020 | 116938 | 1011255 | 33323 |
| 2021 | 86748 | 889225 | 28716 |
| 2022 | 51594 | 749995 | 18741 |
| 2023 | 25706 | 408202 | 9205 |
| 2024 | 5767 | 106117 | 2564 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 20.16 | 21.50 | 30.15 |
| 1997 | 18.14 | 14.15 | 33.45 |
| 1998 | 18.94 | 11.02 | 34.28 |
| 1999 | 17.68 | 6.64 | 31.42 |
| 2000 | 22.52 | 9.97 | 33.85 |
| 2001 | 19.32 | 9.41 | 31.44 |
| 2002 | 23.37 | 11.68 | 36.18 |
| 2003 | 23.00 | 14.05 | 42.43 |
| 2004 | 23.63 | 10.73 | 42.18 |
| 2005 | 24.88 | 8.06 | 47.31 |
| 2006 | 27.84 | 9.43 | 43.42 |
| 2007 | 31.23 | 11.45 | 47.06 |
| 2008 | 29.46 | 12.33 | 45.30 |
| 2009 | 25.81 | 10.42 | 44.35 |
| 2010 | 24.77 | 11.30 | 45.00 |
| 2011 | 23.75 | 12.39 | 45.95 |
| 2012 | 25.50 | 11.69 | 44.42 |
| 2013 | 27.77 | 14.28 | 47.51 |
| 2014 | 28.79 | 15.76 | 51.06 |
| 2015 | 31.15 | 18.14 | 51.75 |
| 2016 | 32.77 | 19.06 | 54.80 |
| 2017 | 34.92 | 21.55 | 56.00 |
| 2018 | 39.18 | 23.01 | 62.58 |
| 2019 | 43.35 | 22.49 | 65.14 |
| 2020 | 43.73 | 22.48 | 68.96 |
| 2021 | 43.05 | 20.06 | 69.73 |
| 2022 | 43.10 | 18.43 | 72.36 |
| 2023 | 44.40 | 17.37 | 73.45 |
| 2024 | 48.19 | 18.34 | 74.39 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 12.62 | 16.28 | 8.24 |
| 1997 | 12.09 | 12.31 | 8.43 |
| 1998 | 12.57 | 14.37 | 7.88 |
| 1999 | 12.31 | 17.99 | 8.86 |
| 2000 | 14.87 | 17.19 | 12.12 |
| 2001 | 12.68 | 19.59 | 12.07 |
| 2002 | 14.86 | 15.51 | 11.25 |
| 2003 | 14.96 | 19.75 | 14.01 |
| 2004 | 16.12 | 22.21 | 13.67 |
| 2005 | 13.66 | 22.25 | 14.03 |
| 2006 | 15.32 | 21.21 | 16.98 |
| 2007 | 14.47 | 19.35 | 16.46 |
| 2008 | 15.67 | 19.32 | 15.77 |
| 2009 | 17.70 | 18.46 | 20.90 |
| 2010 | 16.20 | 18.67 | 20.74 |
| 2011 | 18.89 | 22.01 | 23.48 |
| 2012 | 18.07 | 23.14 | 24.42 |
| 2013 | 20.09 | 22.92 | 30.82 |
| 2014 | 24.17 | 23.62 | 39.31 |
| 2015 | 29.10 | 24.58 | 46.07 |
| 2016 | 30.57 | 22.81 | 53.52 |
| 2017 | 33.28 | 26.60 | 59.90 |
| 2018 | 33.85 | 27.82 | 60.39 |
| 2019 | 36.98 | 30.27 | 61.56 |
| 2020 | 43.30 | 32.63 | 67.31 |
| 2021 | 46.06 | 34.66 | 68.28 |
| 2022 | 45.91 | 33.95 | 68.32 |
| 2023 | 45.76 | 34.39 | 66.39 |
| 2024 | 42.93 | 31.27 | 62.65 |