Tabella dei dati
| 1980 | 20,5% | 1996 | 22,8% | 2012 | 24,5% |
| 1981 | 22,2% | 1997 | 23,6% | 2013 | 23,7% |
| 1982 | 23,8% | 1998 | 23,6% | 2014 | 27,6% |
| 1983 | 22,8% | 1999 | 23,5% | 2015 | 25,6% |
| 1984 | 25,6% | 2000 | 23% | 2016 | 27,1% |
| 1985 | 25,6% | 2001 | 22,8% | 2017 | 25,1% |
| 1986 | 24,6% | 2002 | 23,7% | 2018 | 24,6% |
| 1987 | 24,8% | 2003 | 23,5% | 2019 | 25,7% |
| 1988 | 25,4% | 2004 | 22,1% | 2020 | 27% |
| 1989 | 25,7% | 2005 | 22,4% | 2021 | 30% |
| 1990 | 25,4% | 2006 | 23% | 2022 | 27,3% |
| 1991 | 25,8% | 2007 | 24,1% | 2023 | 27,2% |
| 1992 | 22,6% | 2008 | 27% | 2024 | 27,9% |
| 1993 | 21,3% | 2009 | 28,2% | 2025 | 28,7% |
| 1994 | 23,1% | 2010 | 27,4% | 2026 | 28,5% |
| 1995 | 21,4% | 2011 | 25,9% | | |
Tabella dei dati
| 1980 | 42 mln | 1996 | 217 mln | 2012 | 484 mln |
| 1981 | 58 mln | 1997 | 236 mln | 2013 | 489 mln |
| 1982 | 70 mln | 1998 | 255 mln | 2014 | 575 mln |
| 1983 | 73 mln | 1999 | 265 mln | 2015 | 543 mln |
| 1984 | 92 mln | 2000 | 265 mln | 2016 | 596 mln |
| 1985 | 101 mln | 2001 | 284 mln | 2017 | 572 mln |
| 1986 | 109 mln | 2002 | 312 mln | 2018 | 588 mln |
| 1987 | 122 mln | 2003 | 323 mln | 2019 | 631 mln |
| 1988 | 146 mln | 2004 | 329 mln | 2020 | 629 mln |
| 1989 | 156 mln | 2005 | 351 mln | 2021 | 719 mln |
| 1990 | 173 mln | 2006 | 399 mln | 2022 | 714 mln |
| 1991 | 186 mln | 2007 | 463 mln | 2023 | 770 mln |
| 1992 | 179 mln | 2008 | 535 mln | 2024 | 848 mln |
| 1993 | 173 mln | 2009 | 543 mln | 2025 | 912 mln |
| 1994 | 189 mln | 2010 | 532 mln | 2026 | 950 mln |
| 1995 | 193 mln | 2011 | 499 mln | | |
Tabella dei dati
| 1980 | 24,1% | 1996 | 21,2% | 2012 | 26,3% |
| 1981 | 24,9% | 1997 | 26,4% | 2013 | 29,5% |
| 1982 | 23,5% | 1998 | 25,4% | 2014 | 30,4% |
| 1983 | 24,7% | 1999 | 25,5% | 2015 | 27,6% |
| 1984 | 23,1% | 2000 | 23,8% | 2016 | 27,1% |
| 1985 | 21,4% | 2001 | 24,4% | 2017 | 26,6% |
| 1986 | 22,3% | 2002 | 25,7% | 2018 | 26,3% |
| 1987 | 23,7% | 2003 | 26% | 2019 | 29,1% |
| 1988 | 24,8% | 2004 | 24,9% | 2020 | 32,9% |
| 1989 | 27,6% | 2005 | 26,7% | 2021 | 37,2% |
| 1990 | 23,7% | 2006 | 26,1% | 2022 | 36,6% |
| 1991 | 26,2% | 2007 | 27,1% | 2023 | 39,7% |
| 1992 | 25,9% | 2008 | 28,3% | 2024 | 43,9% |
| 1993 | 22,8% | 2009 | 31% | 2025 | 41% |
| 1994 | 23% | 2010 | 31,1% | 2026 | 40,6% |
| 1995 | 20,3% | 2011 | 29,4% | | |
Tabella dei dati
| 1980 | 50 mln | 1996 | 202 mln | 2012 | 519 mln |
| 1981 | 65 mln | 1997 | 264 mln | 2013 | 609 mln |
| 1982 | 70 mln | 1998 | 274 mln | 2014 | 633 mln |
| 1983 | 79 mln | 1999 | 287 mln | 2015 | 586 mln |
| 1984 | 83 mln | 2000 | 275 mln | 2016 | 595 mln |
| 1985 | 84 mln | 2001 | 304 mln | 2017 | 607 mln |
| 1986 | 99 mln | 2002 | 339 mln | 2018 | 628 mln |
| 1987 | 117 mln | 2003 | 357 mln | 2019 | 716 mln |
| 1988 | 142 mln | 2004 | 369 mln | 2020 | 767 mln |
| 1989 | 168 mln | 2005 | 418 mln | 2021 | 891 mln |
| 1990 | 162 mln | 2006 | 453 mln | 2022 | 959 mln |
| 1991 | 189 mln | 2007 | 523 mln | 2023 | 1,12 mld |
| 1992 | 205 mln | 2008 | 560 mln | 2024 | 1,34 mld |
| 1993 | 186 mln | 2009 | 598 mln | 2025 | 1,3 mld |
| 1994 | 188 mln | 2010 | 604 mln | 2026 | 1,35 mld |
| 1995 | 183 mln | 2011 | 566 mln | | |