Tabella dei dati
| 1988 | 57,7% | 2001 | 67,2% | 2014 | 85,2% |
| 1989 | 56,6% | 2002 | 67,4% | 2015 | 85,6% |
| 1990 | 56,2% | 2003 | 66,4% | 2016 | 83,4% |
| 1991 | 56,4% | 2004 | 65,9% | 2017 | 79,1% |
| 1992 | 56,3% | 2005 | 69,4% | 2018 | 74,6% |
| 1993 | 61% | 2006 | 68,2% | 2019 | 71% |
| 1994 | 64,1% | 2007 | 65,8% | 2020 | 83,2% |
| 1995 | 68,2% | 2008 | 69,5% | 2021 | 82,4% |
| 1996 | 68,2% | 2009 | 80,8% | 2022 | 78,1% |
| 1997 | 63,4% | 2010 | 83,7% | 2023 | 77,8% |
| 1998 | 69,2% | 2011 | 83,4% | 2024 | 79,2% |
| 1999 | 61,3% | 2012 | 82,9% | 2025 | 80,5% |
| 2000 | 66,1% | 2013 | 82,4% | 2026 | 82,1% |
Tabella dei dati
| 1988 | 68,6 mld | 2001 | 148 mld | 2014 | 281 mld |
| 1989 | 72,1 mld | 2002 | 152 mld | 2015 | 293 mld |
| 1990 | 76,9 mld | 2003 | 153 mld | 2016 | 297 mld |
| 1991 | 82,8 mld | 2004 | 159 mld | 2017 | 290 mld |
| 1992 | 87,3 mld | 2005 | 175 mld | 2018 | 286 mld |
| 1993 | 97,6 mld | 2006 | 181 mld | 2019 | 281 mld |
| 1994 | 108 mld | 2007 | 186 mld | 2020 | 316 mld |
| 1995 | 120 mld | 2008 | 203 mld | 2021 | 335 mld |
| 1996 | 124 mld | 2009 | 231 mld | 2022 | 351 mld |
| 1997 | 119 mld | 2010 | 246 mld | 2023 | 372 mld |
| 1998 | 135 mld | 2011 | 257 mld | 2024 | 391 mld |
| 1999 | 125 mld | 2012 | 263 mld | 2025 | 413 mld |
| 2000 | 140 mld | 2013 | 265 mld | 2026 | 434 mld |
Tabella dei dati
| 1999 | 40,5% | 2009 | 57,7% | 2019 | 48,2% |
| 2000 | 44% | 2010 | 61,6% | 2020 | 59,4% |
| 2001 | 43% | 2011 | 61,3% | 2021 | 60,2% |
| 2002 | 44,5% | 2012 | 61,6% | 2022 | 58% |
| 2003 | 44,1% | 2013 | 61,7% | 2023 | 58,9% |
| 2004 | 47,1% | 2014 | 60,3% | 2024 | 60,9% |
| 2005 | 51% | 2015 | 59,2% | 2025 | 62,9% |
| 2006 | 50,7% | 2016 | 57,4% | 2026 | 65% |
| 2007 | 49,7% | 2017 | 56,2% | | |
| 2008 | 50,2% | 2018 | 51% | | |
Tabella dei dati
| 1999 | 82,3 mld | 2009 | 165 mld | 2019 | 191 mld |
| 2000 | 93,4 mld | 2010 | 181 mld | 2020 | 226 mld |
| 2001 | 94,4 mld | 2011 | 189 mld | 2021 | 244 mld |
| 2002 | 100 mld | 2012 | 195 mld | 2022 | 261 mld |
| 2003 | 102 mld | 2013 | 198 mld | 2023 | 281 mld |
| 2004 | 113 mld | 2014 | 199 mld | 2024 | 301 mld |
| 2005 | 129 mld | 2015 | 203 mld | 2025 | 323 mld |
| 2006 | 135 mld | 2016 | 204 mld | 2026 | 344 mld |
| 2007 | 140 mld | 2017 | 206 mld | | |
| 2008 | 146 mld | 2018 | 196 mld | | |