| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 13725 | 1203 | 3837 |
| 1997 | 12906 | 1296 | 3689 |
| 1998 | 12863 | 1379 | 3821 |
| 1999 | 13541 | 1713 | 3922 |
| 2000 | 12978 | 1868 | 3875 |
| 2001 | 13929 | 1908 | 3617 |
| 2002 | 13979 | 2197 | 3732 |
| 2003 | 14276 | 2950 | 3910 |
| 2004 | 15418 | 3571 | 4421 |
| 2005 | 15794 | 4784 | 4262 |
| 2006 | 15899 | 5802 | 4328 |
| 2007 | 17046 | 6595 | 4210 |
| 2008 | 17795 | 7958 | 4478 |
| 2009 | 18259 | 8699 | 4617 |
| 2010 | 19175 | 9428 | 4913 |
| 2011 | 19440 | 11323 | 4785 |
| 2012 | 20073 | 12291 | 5011 |
| 2013 | 19952 | 13960 | 4641 |
| 2014 | 20255 | 16544 | 4827 |
| 2015 | 20258 | 15425 | 4928 |
| 2016 | 20189 | 16781 | 4834 |
| 2017 | 19677 | 17977 | 4786 |
| 2018 | 20617 | 21352 | 5196 |
| 2019 | 19847 | 25922 | 4860 |
| 2020 | 20474 | 30351 | 5209 |
| 2021 | 21585 | 33772 | 5997 |
| 2022 | 20335 | 37645 | 5480 |
| 2023 | 18393 | 37708 | 4908 |
| 2024 | 18612 | 43626 | 4721 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 13456 | 1201 | 3678 |
| 1997 | 12613 | 1291 | 3511 |
| 1998 | 12452 | 1367 | 3646 |
| 1999 | 13062 | 1701 | 3718 |
| 2000 | 12503 | 1845 | 3682 |
| 2001 | 13471 | 1888 | 3395 |
| 2002 | 13367 | 2194 | 3429 |
| 2003 | 13706 | 2934 | 3526 |
| 2004 | 14706 | 3562 | 3858 |
| 2005 | 15105 | 4764 | 3767 |
| 2006 | 15196 | 5786 | 3859 |
| 2007 | 16228 | 6581 | 3766 |
| 2008 | 16862 | 7933 | 4076 |
| 2009 | 17184 | 8661 | 4103 |
| 2010 | 17989 | 9364 | 4475 |
| 2011 | 18402 | 11256 | 4365 |
| 2012 | 18793 | 12072 | 4512 |
| 2013 | 18707 | 13783 | 4361 |
| 2014 | 19027 | 16375 | 4443 |
| 2015 | 18817 | 15275 | 4554 |
| 2016 | 18442 | 16560 | 4374 |
| 2017 | 17860 | 17764 | 4357 |
| 2018 | 18770 | 21093 | 4769 |
| 2019 | 18311 | 25618 | 4484 |
| 2020 | 18782 | 29960 | 4808 |
| 2021 | 20027 | 33429 | 5564 |
| 2022 | 18591 | 37196 | 5034 |
| 2023 | 16766 | 37191 | 4529 |
| 2024 | 17223 | 43128 | 4422 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 269 | 2 | 159 |
| 1997 | 293 | 5 | 178 |
| 1998 | 411 | 12 | 175 |
| 1999 | 479 | 12 | 204 |
| 2000 | 475 | 23 | 193 |
| 2001 | 458 | 20 | 222 |
| 2002 | 612 | 3 | 303 |
| 2003 | 570 | 16 | 384 |
| 2004 | 712 | 9 | 563 |
| 2005 | 689 | 20 | 495 |
| 2006 | 703 | 16 | 469 |
| 2007 | 818 | 14 | 444 |
| 2008 | 933 | 25 | 402 |
| 2009 | 1075 | 38 | 514 |
| 2010 | 1186 | 64 | 438 |
| 2011 | 1038 | 67 | 420 |
| 2012 | 1280 | 219 | 499 |
| 2013 | 1245 | 177 | 280 |
| 2014 | 1228 | 169 | 384 |
| 2015 | 1441 | 150 | 374 |
| 2016 | 1747 | 221 | 460 |
| 2017 | 1817 | 213 | 429 |
| 2018 | 1847 | 259 | 427 |
| 2019 | 1536 | 304 | 376 |
| 2020 | 1692 | 391 | 401 |
| 2021 | 1558 | 343 | 433 |
| 2022 | 1744 | 449 | 446 |
| 2023 | 1627 | 517 | 379 |
| 2024 | 1389 | 498 | 299 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 12661 | 848 | 3479 |
| 1997 | 11830 | 944 | 3273 |
| 1998 | 11820 | 975 | 3331 |
| 1999 | 12312 | 1204 | 3283 |
| 2000 | 12134 | 1333 | 3417 |
| 2001 | 12740 | 1509 | 3314 |
| 2002 | 13134 | 1815 | 3295 |
| 2003 | 13408 | 2406 | 3413 |
| 2004 | 14430 | 2916 | 3728 |
| 2005 | 14765 | 3956 | 3600 |
| 2006 | 14923 | 4917 | 3670 |
| 2007 | 15904 | 5669 | 3606 |
| 2008 | 16523 | 6558 | 3904 |
| 2009 | 16769 | 7284 | 3888 |
| 2010 | 17390 | 8119 | 4241 |
| 2011 | 17746 | 9661 | 4207 |
| 2012 | 18389 | 10616 | 4401 |
| 2013 | 18288 | 11985 | 4271 |
| 2014 | 18524 | 13795 | 4260 |
| 2015 | 18509 | 13632 | 4451 |
| 2016 | 18485 | 15145 | 4352 |
| 2017 | 18073 | 16335 | 4364 |
| 2018 | 19051 | 19587 | 4769 |
| 2019 | 18478 | 23352 | 4546 |
| 2020 | 19029 | 26773 | 4879 |
| 2021 | 19726 | 29455 | 5519 |
| 2022 | 17828 | 32344 | 4923 |
| 2023 | 14657 | 29360 | 4099 |
| 2024 | 7215 | 17268 | 2022 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 1064 | 355 | 358 |
| 1997 | 1076 | 352 | 416 |
| 1998 | 1043 | 404 | 490 |
| 1999 | 1229 | 509 | 639 |
| 2000 | 844 | 535 | 458 |
| 2001 | 1189 | 399 | 303 |
| 2002 | 845 | 382 | 437 |
| 2003 | 868 | 544 | 497 |
| 2004 | 988 | 655 | 693 |
| 2005 | 1029 | 828 | 662 |
| 2006 | 976 | 885 | 658 |
| 2007 | 1142 | 926 | 604 |
| 2008 | 1272 | 1400 | 574 |
| 2009 | 1490 | 1415 | 729 |
| 2010 | 1785 | 1309 | 672 |
| 2011 | 1694 | 1662 | 578 |
| 2012 | 1684 | 1675 | 610 |
| 2013 | 1664 | 1975 | 370 |
| 2014 | 1731 | 2749 | 567 |
| 2015 | 1749 | 1793 | 477 |
| 2016 | 1704 | 1636 | 482 |
| 2017 | 1604 | 1642 | 422 |
| 2018 | 1566 | 1765 | 427 |
| 2019 | 1369 | 2570 | 314 |
| 2020 | 1445 | 3578 | 330 |
| 2021 | 1859 | 4317 | 478 |
| 2022 | 2507 | 5301 | 557 |
| 2023 | 3736 | 8348 | 809 |
| 2024 | 11397 | 26358 | 2699 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 520134 | 11878 | 147546 |
| 1997 | 533828 | 14857 | 137033 |
| 1998 | 534000 | 14377 | 157504 |
| 1999 | 613495 | 21089 | 161027 |
| 2000 | 662463 | 27882 | 176405 |
| 2001 | 699122 | 33770 | 184320 |
| 2002 | 770180 | 43629 | 194698 |
| 2003 | 773006 | 60159 | 185143 |
| 2004 | 843900 | 83369 | 212977 |
| 2005 | 843956 | 107140 | 212623 |
| 2006 | 820319 | 147277 | 214988 |
| 2007 | 861458 | 158237 | 193261 |
| 2008 | 903596 | 187768 | 220381 |
| 2009 | 824297 | 211183 | 196130 |
| 2010 | 859327 | 244490 | 206346 |
| 2011 | 790304 | 274895 | 211819 |
| 2012 | 782209 | 292025 | 195367 |
| 2013 | 762170 | 321023 | 187903 |
| 2014 | 729373 | 342771 | 176301 |
| 2015 | 674500 | 355755 | 187175 |
| 2016 | 648377 | 390709 | 164506 |
| 2017 | 589853 | 442147 | 158398 |
| 2018 | 590060 | 539673 | 163024 |
| 2019 | 486410 | 583417 | 133477 |
| 2020 | 439029 | 612804 | 124740 |
| 2021 | 343289 | 505313 | 108617 |
| 2022 | 195876 | 362826 | 60145 |
| 2023 | 89921 | 194209 | 27176 |
| 2024 | 18765 | 46569 | 5568 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 292540 | 6983 | 119236 |
| 1997 | 297989 | 9239 | 110970 |
| 1998 | 301548 | 8517 | 128218 |
| 1999 | 348896 | 12736 | 133119 |
| 2000 | 384487 | 17066 | 147017 |
| 2001 | 413823 | 19620 | 154616 |
| 2002 | 453866 | 25514 | 162268 |
| 2003 | 461962 | 35662 | 155486 |
| 2004 | 505281 | 50086 | 178816 |
| 2005 | 503967 | 62935 | 178407 |
| 2006 | 493610 | 84023 | 181088 |
| 2007 | 513294 | 88462 | 160758 |
| 2008 | 546716 | 105987 | 182861 |
| 2009 | 493707 | 116960 | 163151 |
| 2010 | 528329 | 134455 | 170672 |
| 2011 | 485265 | 147260 | 175170 |
| 2012 | 481623 | 150961 | 159779 |
| 2013 | 468300 | 163407 | 154944 |
| 2014 | 452429 | 170827 | 143174 |
| 2015 | 418671 | 174630 | 154768 |
| 2016 | 410842 | 179828 | 135227 |
| 2017 | 377046 | 197911 | 132370 |
| 2018 | 388019 | 233487 | 135632 |
| 2019 | 320644 | 237769 | 111378 |
| 2020 | 297233 | 247746 | 104102 |
| 2021 | 230856 | 181152 | 91076 |
| 2022 | 129699 | 121579 | 49832 |
| 2023 | 59288 | 62248 | 22164 |
| 2024 | 11701 | 14060 | 4471 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 227594 | 4895 | 28310 |
| 1997 | 235839 | 5618 | 26063 |
| 1998 | 232452 | 5860 | 29286 |
| 1999 | 264599 | 8353 | 27908 |
| 2000 | 277976 | 10816 | 29388 |
| 2001 | 285299 | 14150 | 29704 |
| 2002 | 316314 | 18115 | 32430 |
| 2003 | 311044 | 24497 | 29657 |
| 2004 | 338619 | 33283 | 34161 |
| 2005 | 339989 | 44205 | 34216 |
| 2006 | 326709 | 63254 | 33900 |
| 2007 | 348164 | 69775 | 32503 |
| 2008 | 356880 | 81781 | 37520 |
| 2009 | 330590 | 94223 | 32979 |
| 2010 | 330998 | 110035 | 35674 |
| 2011 | 305039 | 127635 | 36649 |
| 2012 | 300586 | 141064 | 35588 |
| 2013 | 293870 | 157616 | 32959 |
| 2014 | 276944 | 171944 | 33127 |
| 2015 | 255829 | 181125 | 32407 |
| 2016 | 237535 | 210881 | 29279 |
| 2017 | 212807 | 244236 | 26028 |
| 2018 | 202041 | 306186 | 27392 |
| 2019 | 165766 | 345648 | 22099 |
| 2020 | 141796 | 365058 | 20638 |
| 2021 | 112433 | 324161 | 17541 |
| 2022 | 66177 | 241247 | 10313 |
| 2023 | 30633 | 131961 | 5012 |
| 2024 | 7064 | 32509 | 1097 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 17.43 | 15.96 | 27.05 |
| 1997 | 16.72 | 14.51 | 25.05 |
| 1998 | 18.13 | 13.63 | 26.80 |
| 1999 | 17.10 | 13.60 | 26.01 |
| 2000 | 17.15 | 13.22 | 26.17 |
| 2001 | 15.00 | 12.11 | 26.35 |
| 2002 | 17.50 | 14.43 | 27.87 |
| 2003 | 21.63 | 16.61 | 32.28 |
| 2004 | 22.77 | 16.97 | 34.61 |
| 2005 | 24.10 | 15.51 | 37.19 |
| 2006 | 23.59 | 15.89 | 34.73 |
| 2007 | 24.16 | 15.19 | 39.43 |
| 2008 | 26.11 | 14.80 | 43.50 |
| 2009 | 25.89 | 15.70 | 41.13 |
| 2010 | 26.80 | 16.92 | 44.64 |
| 2011 | 28.19 | 15.14 | 47.71 |
| 2012 | 29.50 | 16.05 | 49.73 |
| 2013 | 30.56 | 15.57 | 53.59 |
| 2014 | 32.67 | 15.52 | 54.82 |
| 2015 | 33.37 | 18.02 | 57.95 |
| 2016 | 35.06 | 17.81 | 59.39 |
| 2017 | 37.13 | 18.23 | 63.23 |
| 2018 | 39.79 | 18.89 | 64.84 |
| 2019 | 40.19 | 16.71 | 68.11 |
| 2020 | 41.69 | 15.54 | 70.30 |
| 2021 | 42.69 | 15.21 | 71.97 |
| 2022 | 43.69 | 13.95 | 74.58 |
| 2023 | 43.69 | 11.93 | 75.84 |
| 2024 | 46.04 | 11.33 | 78.33 |
| Year | United States | China | United Kingdom |
|---|---|---|---|
| 1996 | 18.01 | 21.11 | 22.99 |
| 1997 | 19.18 | 21.91 | 23.34 |
| 1998 | 20.14 | 21.25 | 25.86 |
| 1999 | 20.47 | 21.31 | 22.79 |
| 2000 | 20.42 | 21.20 | 23.61 |
| 2001 | 19.30 | 19.50 | 21.59 |
| 2002 | 18.93 | 20.21 | 22.35 |
| 2003 | 19.70 | 22.47 | 23.68 |
| 2004 | 21.82 | 22.32 | 23.59 |
| 2005 | 20.96 | 24.54 | 22.83 |
| 2006 | 24.14 | 26.30 | 25.12 |
| 2007 | 29.74 | 26.50 | 26.89 |
| 2008 | 40.67 | 27.41 | 31.31 |
| 2009 | 46.35 | 29.18 | 31.82 |
| 2010 | 48.08 | 27.04 | 34.72 |
| 2011 | 49.97 | 27.30 | 36.53 |
| 2012 | 51.94 | 30.27 | 38.97 |
| 2013 | 55.38 | 30.06 | 42.75 |
| 2014 | 57.85 | 34.07 | 48.68 |
| 2015 | 60.33 | 35.97 | 57.06 |
| 2016 | 60.19 | 37.91 | 64.34 |
| 2017 | 60.89 | 41.12 | 69.01 |
| 2018 | 62.37 | 44.68 | 71.46 |
| 2019 | 64.00 | 48.74 | 74.14 |
| 2020 | 66.58 | 48.77 | 76.79 |
| 2021 | 69.31 | 50.61 | 77.26 |
| 2022 | 70.03 | 56.54 | 80.02 |
| 2023 | 69.78 | 55.12 | 81.48 |
| 2024 | 53.62 | 48.66 | 73.31 |