Tabella dei dati
| 1984 | 150,1% | 1999 | 64,5% | 2014 | 12% |
| 1985 | 142,8% | 2000 | 60,7% | 2015 | 13,6% |
| 1986 | 136,6% | 2001 | 53% | 2016 | 15,7% |
| 1987 | 128,8% | 2002 | 48,2% | 2017 | 19,4% |
| 1988 | 119,9% | 2003 | 44,4% | 2018 | 17,5% |
| 1989 | 113,7% | 2004 | 42,4% | 2019 | 22,4% |
| 1990 | 108,1% | 2005 | 39,9% | 2020 | 25,5% |
| 1991 | 103,9% | 2006 | 38,5% | 2021 | 27,9% |
| 1992 | 101% | 2007 | 36,2% | 2022 | 30,2% |
| 1993 | 95,7% | 2008 | 33,4% | 2023 | 31,5% |
| 1994 | 87,8% | 2009 | 31,8% | 2024 | 30% |
| 1995 | 77,7% | 2010 | 30,1% | 2025 | 29,5% |
| 1996 | 75,4% | 2011 | 27,6% | 2026 | 32,4% |
| 1997 | 70,9% | 2012 | 25% | | |
| 1998 | 69,4% | 2013 | 10,5% | | |
Tabella dei dati
| 1984 | 124 mld | 1999 | 111 mld | 2014 | 51,1 mld |
| 1985 | 123 mld | 2000 | 110 mld | 2015 | 58,3 mld |
| 1986 | 122 mld | 2001 | 108 mld | 2016 | 70,7 mld |
| 1987 | 121 mld | 2002 | 107 mld | 2017 | 91,2 mld |
| 1988 | 120 mld | 2003 | 106 mld | 2018 | 85,9 mld |
| 1989 | 119 mld | 2004 | 104 mld | 2019 | 117 mld |
| 1990 | 118 mld | 2005 | 103 mld | 2020 | 134 mld |
| 1991 | 117 mld | 2006 | 104 mld | 2021 | 148 mld |
| 1992 | 117 mld | 2007 | 103 mld | 2022 | 172 mld |
| 1993 | 116 mld | 2008 | 102 mld | 2023 | 190 mld |
| 1994 | 115 mld | 2009 | 101 mld | 2024 | 197 mld |
| 1995 | 114 mld | 2010 | 102 mld | 2025 | 207 mld |
| 1996 | 113 mld | 2011 | 99,7 mld | 2026 | 245 mld |
| 1997 | 113 mld | 2012 | 97,1 mld | | |
| 1998 | 112 mld | 2013 | 43,3 mld | | |