Tabella dei dati
| 1983 | 28% | 1998 | 31% | 2013 | 31,5% |
| 1984 | 27,9% | 1999 | 31,2% | 2014 | 31,3% |
| 1985 | 27,7% | 2000 | 32,2% | 2015 | 32,5% |
| 1986 | 28,6% | 2001 | 31,4% | 2016 | 32,2% |
| 1987 | 28,5% | 2002 | 31,9% | 2017 | 33% |
| 1988 | 28,8% | 2003 | 31,5% | 2018 | 32,3% |
| 1989 | 28,1% | 2004 | 31,3% | 2019 | 32,6% |
| 1990 | 27,2% | 2005 | 31,3% | 2020 | 33,3% |
| 1991 | 27,2% | 2006 | 30,9% | 2021 | 33,1% |
| 1992 | 27,9% | 2007 | 30,5% | 2022 | 31,6% |
| 1993 | 28,9% | 2008 | 31,5% | 2023 | 31,1% |
| 1994 | 29,4% | 2009 | 31,7% | 2024 | 31,8% |
| 1995 | 30,1% | 2010 | 31,2% | 2025 | 31,7% |
| 1996 | 30,5% | 2011 | 31,6% | 2026 | 31,7% |
| 1997 | 30,2% | 2012 | 31,4% | | |
Tabella dei dati
| 1983 | 68,3 mld | 1998 | 138 mld | 2013 | 210 mld |
| 1984 | 72,7 mld | 1999 | 142 mld | 2014 | 213 mld |
| 1985 | 76,6 mld | 2000 | 153 mld | 2015 | 221 mld |
| 1986 | 83,2 mld | 2001 | 154 mld | 2016 | 221 mld |
| 1987 | 85,8 mld | 2002 | 156 mld | 2017 | 230 mld |
| 1988 | 92,1 mld | 2003 | 155 mld | 2018 | 234 mld |
| 1989 | 97 mld | 2004 | 159 mld | 2019 | 239 mld |
| 1990 | 102 mld | 2005 | 165 mld | 2020 | 237 mld |
| 1991 | 107 mld | 2006 | 174 mld | 2021 | 254 mld |
| 1992 | 111 mld | 2007 | 183 mld | 2022 | 259 mld |
| 1993 | 118 mld | 2008 | 196 mld | 2023 | 259 mld |
| 1994 | 123 mld | 2009 | 194 mld | 2024 | 272 mld |
| 1995 | 128 mld | 2010 | 198 mld | 2025 | 275 mld |
| 1996 | 130 mld | 2011 | 204 mld | 2026 | 280 mld |
| 1997 | 131 mld | 2012 | 205 mld | | |
Tabella dei dati
| 1983 | 28,5% | 1998 | 32,3% | 2013 | 32% |
| 1984 | 28,1% | 1999 | 32,8% | 2014 | 31,5% |
| 1985 | 27,7% | 2000 | 31,9% | 2015 | 31,9% |
| 1986 | 27,6% | 2001 | 31,2% | 2016 | 31,9% |
| 1987 | 27,4% | 2002 | 33,6% | 2017 | 31,9% |
| 1988 | 27,9% | 2003 | 32,8% | 2018 | 31,1% |
| 1989 | 27,3% | 2004 | 32,6% | 2019 | 31,3% |
| 1990 | 27,2% | 2005 | 31,9% | 2020 | 36,3% |
| 1991 | 29% | 2006 | 30,1% | 2021 | 33,4% |
| 1992 | 30,8% | 2007 | 29% | 2022 | 30,5% |
| 1993 | 32% | 2008 | 29,6% | 2023 | 30,9% |
| 1994 | 32% | 2009 | 31,2% | 2024 | 31,3% |
| 1995 | 32% | 2010 | 30,9% | 2025 | 31,2% |
| 1996 | 32,5% | 2011 | 31% | 2026 | 31,5% |
| 1997 | 32,5% | 2012 | 31,1% | | |
Tabella dei dati
| 1983 | 69,7 mld | 1998 | 144 mld | 2013 | 213 mld |
| 1984 | 73,3 mld | 1999 | 149 mld | 2014 | 214 mld |
| 1985 | 76,6 mld | 2000 | 152 mld | 2015 | 217 mld |
| 1986 | 80,1 mld | 2001 | 153 mld | 2016 | 220 mld |
| 1987 | 82,6 mld | 2002 | 164 mld | 2017 | 222 mld |
| 1988 | 89,2 mld | 2003 | 162 mld | 2018 | 225 mld |
| 1989 | 94,4 mld | 2004 | 166 mld | 2019 | 229 mld |
| 1990 | 102 mld | 2005 | 169 mld | 2020 | 258 mld |
| 1991 | 114 mld | 2006 | 169 mld | 2021 | 256 mld |
| 1992 | 123 mld | 2007 | 174 mld | 2022 | 250 mld |
| 1993 | 130 mld | 2008 | 184 mld | 2023 | 258 mld |
| 1994 | 134 mld | 2009 | 191 mld | 2024 | 267 mld |
| 1995 | 135 mld | 2010 | 196 mld | 2025 | 271 mld |
| 1996 | 139 mld | 2011 | 200 mld | 2026 | 278 mld |
| 1997 | 141 mld | 2012 | 204 mld | | |