Tableau de données
| 1980 | 28,2% | 1996 | 37% | 2012 | 37,7% |
| 1981 | 28,9% | 1997 | 37,6% | 2013 | 38,7% |
| 1982 | 29,4% | 1998 | 38,4% | 2014 | 39% |
| 1983 | 31,2% | 1999 | 38,7% | 2015 | 38,4% |
| 1984 | 31,3% | 2000 | 38% | 2016 | 37,9% |
| 1985 | 33% | 2001 | 38% | 2017 | 38% |
| 1986 | 33,6% | 2002 | 38,3% | 2018 | 38,9% |
| 1987 | 35,3% | 2003 | 38% | 2019 | 39% |
| 1988 | 35,3% | 2004 | 38,7% | 2020 | 41,4% |
| 1989 | 37,1% | 2005 | 39,7% | 2021 | 42,8% |
| 1990 | 37,2% | 2006 | 40,5% | 2022 | 41,7% |
| 1991 | 38% | 2007 | 41,1% | 2023 | 42,1% |
| 1992 | 39,6% | 2008 | 36,8% | 2024 | 42,3% |
| 1993 | 39,4% | 2009 | 34,8% | 2025 | 42,2% |
| 1994 | 38,5% | 2010 | 36,4% | 2026 | 43,2% |
| 1995 | 37,3% | 2011 | 36,2% | | |
Tableau de données
| 1980 | 28 Md | 1996 | 181 Md | 2012 | 391 Md |
| 1981 | 32,8 Md | 1997 | 195 Md | 2013 | 397 Md |
| 1982 | 38,2 Md | 1998 | 213 Md | 2014 | 405 Md |
| 1983 | 46,3 Md | 1999 | 230 Md | 2015 | 418 Md |
| 1984 | 52,1 Md | 2000 | 246 Md | 2016 | 425 Md |
| 1985 | 61,2 Md | 2001 | 266 Md | 2017 | 444 Md |
| 1986 | 71,1 Md | 2002 | 287 Md | 2018 | 472 Md |
| 1987 | 83,2 Md | 2003 | 305 Md | 2019 | 489 Md |
| 1988 | 92,4 Md | 2004 | 333 Md | 2020 | 468 Md |
| 1989 | 109 Md | 2005 | 368 Md | 2021 | 529 Md |
| 1990 | 122 Md | 2006 | 407 Md | 2022 | 574 Md |
| 1991 | 137 Md | 2007 | 442 Md | 2023 | 630 Md |
| 1992 | 153 Md | 2008 | 409 Md | 2024 | 674 Md |
| 1993 | 159 Md | 2009 | 374 Md | 2025 | 711 Md |
| 1994 | 165 Md | 2010 | 392 Md | 2026 | 767 Md |
| 1995 | 172 Md | 2011 | 387 Md | | |
Tableau de données
| 1980 | 30,2% | 1996 | 42,9% | 2012 | 49,2% |
| 1981 | 31,3% | 1997 | 41,5% | 2013 | 46,2% |
| 1982 | 34,9% | 1998 | 41% | 2014 | 45,1% |
| 1983 | 35,9% | 1999 | 40% | 2015 | 43,7% |
| 1984 | 36,7% | 2000 | 39,1% | 2016 | 42,1% |
| 1985 | 39,8% | 2001 | 38,4% | 2017 | 41% |
| 1986 | 39,6% | 2002 | 38,6% | 2018 | 41,5% |
| 1987 | 38,5% | 2003 | 38,4% | 2019 | 42% |
| 1988 | 38,7% | 2004 | 38,8% | 2020 | 51,4% |
| 1989 | 40,1% | 2005 | 38,4% | 2021 | 49,5% |
| 1990 | 41,1% | 2006 | 38,4% | 2022 | 46,3% |
| 1991 | 42,6% | 2007 | 39,2% | 2023 | 45,4% |
| 1992 | 43,9% | 2008 | 41,3% | 2024 | 45,5% |
| 1993 | 46,3% | 2009 | 46,1% | 2025 | 44,7% |
| 1994 | 44,8% | 2010 | 45,8% | 2026 | 45,3% |
| 1995 | 44,1% | 2011 | 45,9% | | |
Tableau de données
| 1980 | 30 Md | 1996 | 210 Md | 2012 | 510 Md |
| 1981 | 35,5 Md | 1997 | 215 Md | 2013 | 473 Md |
| 1982 | 45,3 Md | 1998 | 228 Md | 2014 | 468 Md |
| 1983 | 53,3 Md | 1999 | 238 Md | 2015 | 475 Md |
| 1984 | 61,1 Md | 2000 | 253 Md | 2016 | 473 Md |
| 1985 | 73,8 Md | 2001 | 269 Md | 2017 | 480 Md |
| 1986 | 83,7 Md | 2002 | 290 Md | 2018 | 503 Md |
| 1987 | 90,9 Md | 2003 | 308 Md | 2019 | 527 Md |
| 1988 | 101 Md | 2004 | 334 Md | 2020 | 581 Md |
| 1989 | 118 Md | 2005 | 357 Md | 2021 | 611 Md |
| 1990 | 134 Md | 2006 | 386 Md | 2022 | 637 Md |
| 1991 | 153 Md | 2007 | 422 Md | 2023 | 680 Md |
| 1992 | 170 Md | 2008 | 460 Md | 2024 | 725 Md |
| 1993 | 187 Md | 2009 | 494 Md | 2025 | 753 Md |
| 1994 | 192 Md | 2010 | 494 Md | 2026 | 803 Md |
| 1995 | 203 Md | 2011 | 491 Md | | |