Tabella dei dati
| 1980 | 47,6% | 1996 | 52,1% | 2012 | 52,7% |
| 1981 | 48,2% | 1997 | 51,9% | 2013 | 53,7% |
| 1982 | 49,2% | 1998 | 51,6% | 2014 | 53,8% |
| 1983 | 50% | 1999 | 52,1% | 2015 | 53,7% |
| 1984 | 50,8% | 2000 | 51,3% | 2016 | 53,6% |
| 1985 | 51,2% | 2001 | 51,4% | 2017 | 54,3% |
| 1986 | 50,2% | 2002 | 50,7% | 2018 | 54% |
| 1987 | 50,8% | 2003 | 50,3% | 2019 | 53% |
| 1988 | 49,4% | 2004 | 50,4% | 2020 | 52,8% |
| 1989 | 49,1% | 2005 | 50,8% | 2021 | 52,9% |
| 1990 | 49,2% | 2006 | 51,1% | 2022 | 53,7% |
| 1991 | 49,8% | 2007 | 50,6% | 2023 | 51,4% |
| 1992 | 49,4% | 2008 | 50,8% | 2024 | 51,5% |
| 1993 | 50,1% | 2009 | 50,6% | 2025 | 52,4% |
| 1994 | 50,4% | 2010 | 50,6% | 2026 | 52,4% |
| 1995 | 50,9% | 2011 | 51,7% | | |
Tabella dei dati
| 1980 | 213 mld | 1996 | 650 mld | 2012 | 1,1 mila mld |
| 1981 | 243 mld | 1997 | 669 mld | 2013 | 1,14 mila mld |
| 1982 | 285 mld | 1998 | 695 mld | 2014 | 1,16 mila mld |
| 1983 | 322 mld | 1999 | 727 mld | 2015 | 1,18 mila mld |
| 1984 | 355 mld | 2000 | 756 mld | 2016 | 1,2 mila mld |
| 1985 | 384 mld | 2001 | 787 mld | 2017 | 1,24 mila mld |
| 1986 | 405 mld | 2002 | 801 mld | 2018 | 1,27 mila mld |
| 1987 | 431 mld | 2003 | 815 mld | 2019 | 1,29 mila mld |
| 1988 | 454 mld | 2004 | 856 mld | 2020 | 1,22 mila mld |
| 1989 | 485 mld | 2005 | 894 mld | 2021 | 1,33 mila mld |
| 1990 | 513 mld | 2006 | 943 mld | 2022 | 1,42 mila mld |
| 1991 | 540 mld | 2007 | 981 mld | 2023 | 1,45 mila mld |
| 1992 | 554 mld | 2008 | 1,01 mila mld | 2024 | 1,5 mila mld |
| 1993 | 569 mld | 2009 | 980 mld | 2025 | 1,56 mila mld |
| 1994 | 591 mld | 2010 | 1,01 mila mld | 2026 | 1,6 mila mld |
| 1995 | 618 mld | 2011 | 1,07 mila mld | | |
Tabella dei dati
| 1980 | 46,9% | 1996 | 56% | 2012 | 57,9% |
| 1981 | 49,5% | 1997 | 55,6% | 2013 | 58,6% |
| 1982 | 50,8% | 1998 | 54% | 2014 | 58,4% |
| 1983 | 52,6% | 1999 | 53,7% | 2015 | 57,6% |
| 1984 | 53,6% | 2000 | 52,6% | 2016 | 57,4% |
| 1985 | 54,2% | 2001 | 52,8% | 2017 | 57,7% |
| 1986 | 53,4% | 2002 | 53,9% | 2018 | 56,4% |
| 1987 | 52,8% | 2003 | 54,4% | 2019 | 55,3% |
| 1988 | 52% | 2004 | 54% | 2020 | 61,7% |
| 1989 | 50,9% | 2005 | 54,3% | 2021 | 59,5% |
| 1990 | 51,6% | 2006 | 53,7% | 2022 | 58,4% |
| 1991 | 52,7% | 2007 | 53,6% | 2023 | 56,8% |
| 1992 | 54% | 2008 | 54,3% | 2024 | 57,3% |
| 1993 | 56,5% | 2009 | 58% | 2025 | 57,5% |
| 1994 | 55,9% | 2010 | 57,7% | 2026 | 57,4% |
| 1995 | 56% | 2011 | 57% | | |
Tabella dei dati
| 1980 | 210 mld | 1996 | 699 mld | 2012 | 1,21 mila mld |
| 1981 | 250 mld | 1997 | 717 mld | 2013 | 1,24 mila mld |
| 1982 | 294 mld | 1998 | 727 mld | 2014 | 1,26 mila mld |
| 1983 | 338 mld | 1999 | 749 mld | 2015 | 1,27 mila mld |
| 1984 | 375 mld | 2000 | 775 mld | 2016 | 1,28 mila mld |
| 1985 | 406 mld | 2001 | 808 mld | 2017 | 1,32 mila mld |
| 1986 | 431 mld | 2002 | 851 mld | 2018 | 1,33 mila mld |
| 1987 | 448 mld | 2003 | 882 mld | 2019 | 1,35 mila mld |
| 1988 | 478 mld | 2004 | 916 mld | 2020 | 1,43 mila mld |
| 1989 | 503 mld | 2005 | 956 mld | 2021 | 1,49 mila mld |
| 1990 | 539 mld | 2006 | 992 mld | 2022 | 1,55 mila mld |
| 1991 | 571 mld | 2007 | 1,04 mila mld | 2023 | 1,61 mila mld |
| 1992 | 606 mld | 2008 | 1,08 mila mld | 2024 | 1,67 mila mld |
| 1993 | 642 mld | 2009 | 1,12 mila mld | 2025 | 1,71 mila mld |
| 1994 | 656 mld | 2010 | 1,15 mila mld | 2026 | 1,75 mila mld |
| 1995 | 680 mld | 2011 | 1,18 mila mld | | |