Tabella dei dati
| 1980 | 40,9% | 1996 | 24,6% | 2012 | 30,6% |
| 1981 | 28,9% | 1997 | 24% | 2013 | 38,6% |
| 1982 | 24,4% | 1998 | 24% | 2014 | 35,7% |
| 1983 | 25% | 1999 | 22,5% | 2015 | 34,7% |
| 1984 | 20,4% | 2000 | 20,5% | 2016 | 29,8% |
| 1985 | 19,8% | 2001 | 19,1% | 2017 | 27,2% |
| 1986 | 21,1% | 2002 | 22,8% | 2018 | 36% |
| 1987 | 23,5% | 2003 | 24,5% | 2019 | 37,2% |
| 1988 | 21,1% | 2004 | 26% | 2020 | 34,1% |
| 1989 | 21,1% | 2005 | 29,8% | 2021 | 47,5% |
| 1990 | 19,9% | 2006 | 29,9% | 2022 | 46,1% |
| 1991 | 19,1% | 2007 | 29,9% | 2023 | 43,9% |
| 1992 | 20,3% | 2008 | 28% | 2024 | 33,1% |
| 1993 | 21,6% | 2009 | 29,1% | 2025 | 30,7% |
| 1994 | 23% | 2010 | 27% | 2026 | 32,2% |
| 1995 | 24,6% | 2011 | 31,9% | | |
Tabella dei dati
| 1980 | 64 mln | 1996 | 207 mln | 2012 | 702 mln |
| 1981 | 54 mln | 1997 | 227 mln | 2013 | 935 mln |
| 1982 | 52 mln | 1998 | 237 mln | 2014 | 939 mln |
| 1983 | 52 mln | 1999 | 236 mln | 2015 | 897 mln |
| 1984 | 50 mln | 2000 | 242 mln | 2016 | 811 mln |
| 1985 | 54 mln | 2001 | 247 mln | 2017 | 777 mln |
| 1986 | 68 mln | 2002 | 308 mln | 2018 | 1,03 mld |
| 1987 | 86 mln | 2003 | 319 mln | 2019 | 1,09 mld |
| 1988 | 92 mln | 2004 | 371 mln | 2020 | 799 mln |
| 1989 | 102 mln | 2005 | 461 mln | 2021 | 1,08 mld |
| 1990 | 109 mln | 2006 | 542 mln | 2022 | 1,2 mld |
| 1991 | 104 mln | 2007 | 579 mln | 2023 | 1,23 mld |
| 1992 | 122 mln | 2008 | 587 mln | 2024 | 938 mln |
| 1993 | 141 mln | 2009 | 609 mln | 2025 | 897 mln |
| 1994 | 169 mln | 2010 | 568 mln | 2026 | 992 mln |
| 1995 | 194 mln | 2011 | 719 mln | | |
Tabella dei dati
| 1980 | 47,4% | 1996 | 26,8% | 2012 | 26,4% |
| 1981 | 33,3% | 1997 | 26,3% | 2013 | 27,9% |
| 1982 | 29% | 1998 | 29,1% | 2014 | 27,4% |
| 1983 | 29% | 1999 | 33,6% | 2015 | 29% |
| 1984 | 25,2% | 2000 | 33,3% | 2016 | 26,1% |
| 1985 | 28,2% | 2001 | 29,5% | 2017 | 25,5% |
| 1986 | 25,3% | 2002 | 34,1% | 2018 | 34,2% |
| 1987 | 38,8% | 2003 | 30% | 2019 | 37,9% |
| 1988 | 28,6% | 2004 | 32,4% | 2020 | 37,2% |
| 1989 | 24% | 2005 | 33,1% | 2021 | 42% |
| 1990 | 19,3% | 2006 | 31,2% | 2022 | 50,4% |
| 1991 | 18,2% | 2007 | 30,9% | 2023 | 43,7% |
| 1992 | 19,8% | 2008 | 29,5% | 2024 | 44,4% |
| 1993 | 21,3% | 2009 | 30,4% | 2025 | 42,4% |
| 1994 | 22,2% | 2010 | 31,2% | 2026 | 40,8% |
| 1995 | 23,7% | 2011 | 30,3% | | |
Tabella dei dati
| 1980 | 74 mln | 1996 | 226 mln | 2012 | 606 mln |
| 1981 | 62 mln | 1997 | 249 mln | 2013 | 676 mln |
| 1982 | 62 mln | 1998 | 288 mln | 2014 | 720 mln |
| 1983 | 61 mln | 1999 | 352 mln | 2015 | 751 mln |
| 1984 | 62 mln | 2000 | 394 mln | 2016 | 708 mln |
| 1985 | 77 mln | 2001 | 382 mln | 2017 | 729 mln |
| 1986 | 81 mln | 2002 | 460 mln | 2018 | 981 mln |
| 1987 | 142 mln | 2003 | 391 mln | 2019 | 1,11 mld |
| 1988 | 125 mln | 2004 | 461 mln | 2020 | 872 mln |
| 1989 | 116 mln | 2005 | 512 mln | 2021 | 955 mln |
| 1990 | 106 mln | 2006 | 566 mln | 2022 | 1,31 mld |
| 1991 | 99 mln | 2007 | 598 mln | 2023 | 1,22 mld |
| 1992 | 119 mln | 2008 | 620 mln | 2024 | 1,26 mld |
| 1993 | 140 mln | 2009 | 635 mln | 2025 | 1,24 mld |
| 1994 | 163 mln | 2010 | 655 mln | 2026 | 1,26 mld |
| 1995 | 187 mln | 2011 | 683 mln | | |