Tabella dei dati
| 1990 | 53,2% | 2003 | 35,2% | 2016 | 30,9% |
| 1991 | 55% | 2004 | 47,6% | 2017 | 27,8% |
| 1992 | 51,5% | 2005 | 38,8% | 2018 | 31,2% |
| 1993 | 53,3% | 2006 | 37,9% | 2019 | 33,5% |
| 1994 | 48% | 2007 | 39,8% | 2020 | 32,6% |
| 1995 | 46,5% | 2008 | 33% | 2021 | 29,6% |
| 1996 | 46,4% | 2009 | 50,6% | 2022 | 34,7% |
| 1997 | 38,2% | 2010 | 36,6% | 2023 | 32,2% |
| 1998 | 48,1% | 2011 | 33,7% | 2024 | 26,7% |
| 1999 | 38% | 2012 | 39,5% | 2025 | 26,1% |
| 2000 | 34,4% | 2013 | 47,6% | 2026 | 25,5% |
| 2001 | 36,6% | 2014 | 45,7% | | |
| 2002 | 39,5% | 2015 | 57% | | |
Tabella dei dati
| 1990 | 12,1 mld | 2003 | 30,4 mld | 2016 | 171 mld |
| 1991 | 11,2 mld | 2004 | 53,1 mld | 2017 | 163 mld |
| 1992 | 12 mld | 2005 | 63 mld | 2018 | 208 mld |
| 1993 | 11,3 mld | 2006 | 81 mld | 2019 | 215 mld |
| 1994 | 10,4 mld | 2007 | 110 mld | 2020 | 171 mld |
| 1995 | 11,6 mld | 2008 | 135 mld | 2021 | 194 mld |
| 1996 | 13,1 mld | 2009 | 162 mld | 2022 | 298 mld |
| 1997 | 13,9 mld | 2010 | 159 mld | 2023 | 255 mld |
| 1998 | 14,9 mld | 2011 | 206 mld | 2024 | 213 mld |
| 1999 | 15,6 mld | 2012 | 269 mld | 2025 | 210 mld |
| 2000 | 22,7 mld | 2013 | 344 mld | 2026 | 202 mld |
| 2001 | 23,3 mld | 2014 | 343 mld | | |
| 2002 | 27,8 mld | 2015 | 336 mld | | |
Tabella dei dati
| 1990 | 50% | 2003 | 28,5% | 2016 | 40,1% |
| 1991 | 57,5% | 2004 | 29,9% | 2017 | 34,7% |
| 1992 | 54,2% | 2005 | 29% | 2018 | 28,9% |
| 1993 | 62,8% | 2006 | 29,5% | 2019 | 32,5% |
| 1994 | 59,8% | 2007 | 29,5% | 2020 | 34,7% |
| 1995 | 52,2% | 2008 | 23,5% | 2021 | 29,4% |
| 1996 | 55,2% | 2009 | 36,4% | 2022 | 24,3% |
| 1997 | 47,6% | 2010 | 32% | 2023 | 26,7% |
| 1998 | 55,1% | 2011 | 28,5% | 2024 | 26% |
| 1999 | 42,4% | 2012 | 31% | 2025 | 27,1% |
| 2000 | 29,8% | 2013 | 28,3% | 2026 | 29% |
| 2001 | 32,1% | 2014 | 32,3% | | |
| 2002 | 31,6% | 2015 | 38,6% | | |
Tabella dei dati
| 1990 | 11,4 mld | 2003 | 24,6 mld | 2016 | 222 mld |
| 1991 | 11,7 mld | 2004 | 33,4 mld | 2017 | 203 mld |
| 1992 | 12,6 mld | 2005 | 47,1 mld | 2018 | 193 mld |
| 1993 | 13,3 mld | 2006 | 63,1 mld | 2019 | 208 mld |
| 1994 | 12,9 mld | 2007 | 81,5 mld | 2020 | 182 mld |
| 1995 | 13 mld | 2008 | 96,5 mld | 2021 | 192 mld |
| 1996 | 15,6 mld | 2009 | 117 mld | 2022 | 209 mld |
| 1997 | 17,3 mld | 2010 | 139 mld | 2023 | 211 mld |
| 1998 | 17 mld | 2011 | 174 mld | 2024 | 208 mld |
| 1999 | 17,4 mld | 2012 | 211 mld | 2025 | 218 mld |
| 2000 | 19,6 mld | 2013 | 205 mld | 2026 | 229 mld |
| 2001 | 20,5 mld | 2014 | 243 mld | | |
| 2002 | 22,2 mld | 2015 | 227 mld | | |