Tabella dei dati
| 1980 | 36,9% | 1996 | 42,8% | 2012 | 38,4% |
| 1981 | 38,9% | 1997 | 43,5% | 2013 | 38,5% |
| 1982 | 39,5% | 1998 | 43,5% | 2014 | 38,5% |
| 1983 | 39% | 1999 | 43,4% | 2015 | 40% |
| 1984 | 38,8% | 2000 | 43,2% | 2016 | 40,3% |
| 1985 | 38,7% | 2001 | 41,6% | 2017 | 40,3% |
| 1986 | 39,5% | 2002 | 40,2% | 2018 | 41% |
| 1987 | 39,7% | 2003 | 40,1% | 2019 | 40,6% |
| 1988 | 40,3% | 2004 | 39,9% | 2020 | 41,4% |
| 1989 | 40,5% | 2005 | 40,1% | 2021 | 42,4% |
| 1990 | 42,2% | 2006 | 40,5% | 2022 | 41% |
| 1991 | 43,1% | 2007 | 40,3% | 2023 | 41,6% |
| 1992 | 43,3% | 2008 | 39% | 2024 | 42,2% |
| 1993 | 42,5% | 2009 | 39,5% | 2025 | 42,2% |
| 1994 | 42,1% | 2010 | 38,3% | 2026 | 41,9% |
| 1995 | 42,2% | 2011 | 38,3% | | |
Tabella dei dati
| 1980 | 119 mld | 1996 | 368 mld | 2012 | 702 mld |
| 1981 | 143 mld | 1997 | 395 mld | 2013 | 732 mld |
| 1982 | 153 mld | 1998 | 410 mld | 2014 | 769 mld |
| 1983 | 164 mld | 1999 | 438 mld | 2015 | 795 mld |
| 1984 | 179 mld | 2000 | 478 mld | 2016 | 816 mld |
| 1985 | 194 mld | 2001 | 476 mld | 2017 | 864 mld |
| 1986 | 208 mld | 2002 | 479 mld | 2018 | 917 mld |
| 1987 | 228 mld | 2003 | 504 mld | 2019 | 939 mld |
| 1988 | 252 mld | 2004 | 533 mld | 2020 | 920 mld |
| 1989 | 272 mld | 2005 | 570 mld | 2021 | 1,08 mila mld |
| 1990 | 293 mld | 2006 | 606 mld | 2022 | 1,18 mila mld |
| 1991 | 302 mld | 2007 | 636 mld | 2023 | 1,23 mila mld |
| 1992 | 311 mld | 2008 | 646 mld | 2024 | 1,31 mila mld |
| 1993 | 318 mld | 2009 | 621 mld | 2025 | 1,37 mila mld |
| 1994 | 333 mld | 2010 | 639 mld | 2026 | 1,43 mila mld |
| 1995 | 351 mld | 2011 | 679 mld | | |
Tabella dei dati
| 1980 | 40,9% | 1996 | 45,9% | 2012 | 40,9% |
| 1981 | 41,8% | 1997 | 43,5% | 2013 | 40% |
| 1982 | 46,4% | 1998 | 43,4% | 2014 | 38,4% |
| 1983 | 47% | 1999 | 41,8% | 2015 | 40% |
| 1984 | 46,8% | 2000 | 40,6% | 2016 | 40,8% |
| 1985 | 47,5% | 2001 | 41,1% | 2017 | 40,5% |
| 1986 | 46,8% | 2002 | 40,4% | 2018 | 40,7% |
| 1987 | 45,4% | 2003 | 40,3% | 2019 | 40,6% |
| 1988 | 44,8% | 2004 | 39,1% | 2020 | 52,4% |
| 1989 | 45,3% | 2005 | 38,5% | 2021 | 45,5% |
| 1990 | 48,1% | 2006 | 38,7% | 2022 | 40,4% |
| 1991 | 51,4% | 2007 | 38,5% | 2023 | 41,8% |
| 1992 | 52,5% | 2008 | 38,8% | 2024 | 44,3% |
| 1993 | 51,5% | 2009 | 43,4% | 2025 | 44% |
| 1994 | 49% | 2010 | 43,1% | 2026 | 44,6% |
| 1995 | 47,7% | 2011 | 41,6% | | |
Tabella dei dati
| 1980 | 132 mld | 1996 | 394 mld | 2012 | 748 mld |
| 1981 | 154 mld | 1997 | 394 mld | 2013 | 760 mld |
| 1982 | 180 mld | 1998 | 408 mld | 2014 | 765 mld |
| 1983 | 198 mld | 1999 | 421 mld | 2015 | 797 mld |
| 1984 | 216 mld | 2000 | 449 mld | 2016 | 825 mld |
| 1985 | 237 mld | 2001 | 470 mld | 2017 | 866 mld |
| 1986 | 247 mld | 2002 | 482 mld | 2018 | 909 mld |
| 1987 | 261 mld | 2003 | 505 mld | 2019 | 939 mld |
| 1988 | 281 mld | 2004 | 523 mld | 2020 | 1,16 mila mld |
| 1989 | 304 mld | 2005 | 548 mld | 2021 | 1,15 mila mld |
| 1990 | 334 mld | 2006 | 579 mld | 2022 | 1,16 mila mld |
| 1991 | 361 mld | 2007 | 608 mld | 2023 | 1,24 mila mld |
| 1992 | 377 mld | 2008 | 643 mld | 2024 | 1,38 mila mld |
| 1993 | 385 mld | 2009 | 682 mld | 2025 | 1,43 mila mld |
| 1994 | 388 mld | 2010 | 717 mld | 2026 | 1,52 mila mld |
| 1995 | 397 mld | 2011 | 738 mld | | |