Tabella dei dati
| 1981 | 19,9% | 1997 | 20,5% | 2013 | 21% |
| 1982 | 16,3% | 1998 | 16,7% | 2014 | 20,8% |
| 1983 | 14,4% | 1999 | 17,8% | 2015 | 18,6% |
| 1984 | 14,2% | 2000 | 16,9% | 2016 | 22,6% |
| 1985 | 15,5% | 2001 | 13,4% | 2017 | 22,9% |
| 1986 | 14,5% | 2002 | 13,7% | 2018 | 20,7% |
| 1987 | 14,8% | 2003 | 16,4% | 2019 | 20,4% |
| 1988 | 15% | 2004 | 17,9% | 2020 | 20,7% |
| 1989 | 15% | 2005 | 17,2% | 2021 | 23,7% |
| 1990 | 14,5% | 2006 | 18,8% | 2022 | 21,7% |
| 1991 | 15,9% | 2007 | 21,3% | 2023 | 18,1% |
| 1992 | 16,2% | 2008 | 18,9% | 2024 | 17,4% |
| 1993 | 17,3% | 2009 | 18,8% | 2025 | 18,5% |
| 1994 | 16,4% | 2010 | 20,7% | 2026 | 17,7% |
| 1995 | 15,8% | 2011 | 22,4% | | |
| 1996 | 16,4% | 2012 | 21,4% | | |
Tabella dei dati
| 1981 | 35,8 mld | 1997 | 281 mld | 2013 | 455 mld |
| 1982 | 32,3 mld | 1998 | 216 mld | 2014 | 479 mld |
| 1983 | 32,8 mld | 1999 | 233 mld | 2015 | 450 mld |
| 1984 | 38,5 mld | 2000 | 225 mld | 2016 | 573 mld |
| 1985 | 43,7 mld | 2001 | 176 mld | 2017 | 620 mld |
| 1986 | 48,6 mld | 2002 | 177 mld | 2018 | 600 mld |
| 1987 | 60,9 mld | 2003 | 207 mld | 2019 | 591 mld |
| 1988 | 72,7 mld | 2004 | 238 mld | 2020 | 564 mld |
| 1989 | 82,4 mld | 2005 | 247 mld | 2021 | 694 mld |
| 1990 | 89,5 mld | 2006 | 288 mld | 2022 | 622 mld |
| 1991 | 115 mld | 2007 | 358 mld | 2023 | 549 mld |
| 1992 | 135 mld | 2008 | 317 mld | 2024 | 565 mld |
| 1993 | 167 mld | 2009 | 318 mld | 2025 | 627 mld |
| 1994 | 175 mld | 2010 | 376 mld | 2026 | 634 mld |
| 1995 | 180 mld | 2011 | 438 mld | | |
| 1996 | 208 mld | 2012 | 442 mld | | |
Tabella dei dati
| 1981 | 17,1% | 1997 | 14,1% | 2013 | 20% |
| 1982 | 16,7% | 1998 | 18,5% | 2014 | 17,3% |
| 1983 | 15,5% | 1999 | 17,1% | 2015 | 18% |
| 1984 | 13,3% | 2000 | 17,5% | 2016 | 18,3% |
| 1985 | 14,5% | 2001 | 18,2% | 2017 | 17,4% |
| 1986 | 12,7% | 2002 | 18,5% | 2018 | 18,4% |
| 1987 | 11,8% | 2003 | 19,6% | 2019 | 21% |
| 1988 | 11,7% | 2004 | 18,2% | 2020 | 29,9% |
| 1989 | 13% | 2005 | 16,2% | 2021 | 23,7% |
| 1990 | 13,8% | 2006 | 14,8% | 2022 | 28,3% |
| 1991 | 12,8% | 2007 | 13,9% | 2023 | 23,7% |
| 1992 | 13,5% | 2008 | 18,6% | 2024 | 23,2% |
| 1993 | 15,3% | 2009 | 17,3% | 2025 | 23,2% |
| 1994 | 15,4% | 2010 | 16,6% | 2026 | 22,9% |
| 1995 | 16,1% | 2011 | 18,6% | | |
| 1996 | 14,4% | 2012 | 18,3% | | |
Tabella dei dati
| 1981 | 30,8 mld | 1997 | 194 mld | 2013 | 434 mld |
| 1982 | 33,1 mld | 1998 | 239 mld | 2014 | 396 mld |
| 1983 | 35,3 mld | 1999 | 223 mld | 2015 | 436 mld |
| 1984 | 36,1 mld | 2000 | 233 mld | 2016 | 462 mld |
| 1985 | 40,8 mld | 2001 | 239 mld | 2017 | 471 mld |
| 1986 | 42,7 mld | 2002 | 239 mld | 2018 | 532 mld |
| 1987 | 48,4 mld | 2003 | 247 mld | 2019 | 608 mld |
| 1988 | 56,6 mld | 2004 | 242 mld | 2020 | 816 mld |
| 1989 | 71,4 mld | 2005 | 233 mld | 2021 | 693 mld |
| 1990 | 85,6 mld | 2006 | 227 mld | 2022 | 810 mld |
| 1991 | 92,2 mld | 2007 | 235 mld | 2023 | 721 mld |
| 1992 | 113 mld | 2008 | 312 mld | 2024 | 753 mld |
| 1993 | 147 mld | 2009 | 293 mld | 2025 | 789 mld |
| 1994 | 164 mld | 2010 | 301 mld | 2026 | 818 mld |
| 1995 | 183 mld | 2011 | 364 mld | | |
| 1996 | 183 mld | 2012 | 377 mld | | |