Tabella dei dati
| 1980 | 22% | 1996 | 37,8% | 2012 | 47,9% |
| 1981 | 21% | 1997 | 38,8% | 2013 | 48,9% |
| 1982 | 23,2% | 1998 | 40,2% | 2014 | 47,2% |
| 1983 | 24,1% | 1999 | 42% | 2015 | 48,8% |
| 1984 | 24,8% | 2000 | 43,9% | 2016 | 50,6% |
| 1985 | 24,7% | 2001 | 41,8% | 2017 | 49,6% |
| 1986 | 25,2% | 2002 | 40,9% | 2018 | 49,3% |
| 1987 | 25,9% | 2003 | 39,8% | 2019 | 47,5% |
| 1988 | 24,2% | 2004 | 39,8% | 2020 | 48,9% |
| 1989 | 22,9% | 2005 | 40,3% | 2021 | 49% |
| 1990 | 25,2% | 2006 | 39,8% | 2022 | 50,5% |
| 1991 | 25,6% | 2007 | 41% | 2023 | 48,2% |
| 1992 | 26,3% | 2008 | 41,2% | 2024 | 49,5% |
| 1993 | 27,2% | 2009 | 39,4% | 2025 | 50,9% |
| 1994 | 28,4% | 2010 | 41,7% | 2026 | 50,9% |
| 1995 | 36,8% | 2011 | 44,6% | | |
Tabella dei dati
| 1980 | 1,54 mld | 1996 | 38 mld | 2012 | 89,1 mld |
| 1981 | 1,76 mld | 1997 | 43,2 mld | 2013 | 87,1 mld |
| 1982 | 2,45 mld | 1998 | 48,7 mld | 2014 | 83,1 mld |
| 1983 | 3,03 mld | 1999 | 54 mld | 2015 | 85,6 mld |
| 1984 | 3,88 mld | 2000 | 59,8 mld | 2016 | 88,2 mld |
| 1985 | 4,72 mld | 2001 | 61,7 mld | 2017 | 88 mld |
| 1986 | 5,75 mld | 2002 | 65 mld | 2018 | 89,1 mld |
| 1987 | 6,68 mld | 2003 | 69,3 mld | 2019 | 88 mld |
| 1988 | 7,58 mld | 2004 | 75,1 mld | 2020 | 82 mld |
| 1989 | 8,52 mld | 2005 | 78,4 mld | 2021 | 90,4 mld |
| 1990 | 11,3 mld | 2006 | 85,3 mld | 2022 | 105 mld |
| 1991 | 14,2 mld | 2007 | 93,9 mld | 2023 | 108 mld |
| 1992 | 16,8 mld | 2008 | 98,4 mld | 2024 | 117 mld |
| 1993 | 19,6 mld | 2009 | 92,3 mld | 2025 | 126 mld |
| 1994 | 23,3 mld | 2010 | 93,1 mld | 2026 | 133 mld |
| 1995 | 33,8 mld | 2011 | 90,7 mld | | |
Tabella dei dati
| 1980 | 24,5% | 1996 | 46,1% | 2012 | 54,9% |
| 1981 | 28,1% | 1997 | 45,1% | 2013 | 53% |
| 1982 | 28,7% | 1998 | 46,7% | 2014 | 51,5% |
| 1983 | 30,2% | 1999 | 48% | 2015 | 51,9% |
| 1984 | 32% | 2000 | 48,2% | 2016 | 50,3% |
| 1985 | 34,2% | 2001 | 47,5% | 2017 | 48,5% |
| 1986 | 33,8% | 2002 | 47,1% | 2018 | 48,6% |
| 1987 | 34% | 2003 | 47,9% | 2019 | 47,6% |
| 1988 | 33,8% | 2004 | 48,8% | 2020 | 59,3% |
| 1989 | 34,8% | 2005 | 46,6% | 2021 | 56,7% |
| 1990 | 38,5% | 2006 | 45,9% | 2022 | 53,1% |
| 1991 | 35,2% | 2007 | 47,8% | 2023 | 49,6% |
| 1992 | 36,9% | 2008 | 51,5% | 2024 | 48,2% |
| 1993 | 38,6% | 2009 | 54,8% | 2025 | 49,7% |
| 1994 | 36,9% | 2010 | 53,1% | 2026 | 50,3% |
| 1995 | 46,6% | 2011 | 55,1% | | |
Tabella dei dati
| 1980 | 1,72 mld | 1996 | 46,5 mld | 2012 | 102 mld |
| 1981 | 2,36 mld | 1997 | 50,1 mld | 2013 | 94,4 mld |
| 1982 | 3,03 mld | 1998 | 56,6 mld | 2014 | 90,7 mld |
| 1983 | 3,81 mld | 1999 | 61,7 mld | 2015 | 90,9 mld |
| 1984 | 5,01 mld | 2000 | 65,6 mld | 2016 | 87,7 mld |
| 1985 | 6,54 mld | 2001 | 70 mld | 2017 | 86,1 mld |
| 1986 | 7,71 mld | 2002 | 74,9 mld | 2018 | 87,7 mld |
| 1987 | 8,76 mld | 2003 | 83,4 mld | 2019 | 88,1 mld |
| 1988 | 10,6 mld | 2004 | 92,2 mld | 2020 | 99,3 mld |
| 1989 | 12,9 mld | 2005 | 90,8 mld | 2021 | 105 mld |
| 1990 | 17,3 mld | 2006 | 98,3 mld | 2022 | 110 mld |
| 1991 | 19,5 mld | 2007 | 110 mld | 2023 | 111 mld |
| 1992 | 23,7 mld | 2008 | 123 mld | 2024 | 114 mld |
| 1993 | 27,9 mld | 2009 | 128 mld | 2025 | 123 mld |
| 1994 | 30,2 mld | 2010 | 119 mld | 2026 | 131 mld |
| 1995 | 42,8 mld | 2011 | 112 mld | | |