Tabella dei dati
| 1990 | 30,7% | 2003 | 23,5% | 2016 | 20,3% |
| 1991 | 29% | 2004 | 22,5% | 2017 | 19,6% |
| 1992 | 30% | 2005 | 21,7% | 2018 | 20,2% |
| 1993 | 28,1% | 2006 | 23% | 2019 | 21,6% |
| 1994 | 28,7% | 2007 | 23,3% | 2020 | 20,1% |
| 1995 | 25,7% | 2008 | 23,5% | 2021 | 18,4% |
| 1996 | 25,7% | 2009 | 25% | 2022 | 20,1% |
| 1997 | 26% | 2010 | 22,3% | 2023 | 20,9% |
| 1998 | 22,5% | 2011 | 23,5% | 2024 | 20,6% |
| 1999 | 21,6% | 2012 | 25,4% | 2025 | 19,9% |
| 2000 | 19,6% | 2013 | 24,3% | 2026 | 19,2% |
| 2001 | 23,9% | 2014 | 23,3% | | |
| 2002 | 23,2% | 2015 | 22,2% | | |
Tabella dei dati
| 1990 | 39,2 mld | 2003 | 107 mld | 2016 | 253 mld |
| 1991 | 42,7 mld | 2004 | 116 mld | 2017 | 269 mld |
| 1992 | 49,3 mld | 2005 | 124 mld | 2018 | 292 mld |
| 1993 | 52,6 mld | 2006 | 144 mld | 2019 | 326 mld |
| 1994 | 61,1 mld | 2007 | 163 mld | 2020 | 286 mld |
| 1995 | 62,3 mld | 2008 | 190 mld | 2021 | 285 mld |
| 1996 | 70,9 mld | 2009 | 187 mld | 2022 | 360 mld |
| 1997 | 79,8 mld | 2010 | 186 mld | 2023 | 381 mld |
| 1998 | 69,4 mld | 2011 | 217 mld | 2024 | 398 mld |
| 1999 | 70,9 mld | 2012 | 250 mld | 2025 | 402 mld |
| 2000 | 76 mld | 2013 | 251 mld | 2026 | 419 mld |
| 2001 | 91,6 mld | 2014 | 262 mld | | |
| 2002 | 96,8 mld | 2015 | 261 mld | | |
Tabella dei dati
| 1990 | 30,5% | 2003 | 28,1% | 2016 | 22,9% |
| 1991 | 27,4% | 2004 | 25,9% | 2017 | 22% |
| 1992 | 28,2% | 2005 | 24,5% | 2018 | 22,8% |
| 1993 | 24,6% | 2006 | 25,6% | 2019 | 23,6% |
| 1994 | 23,3% | 2007 | 25,9% | 2020 | 25% |
| 1995 | 22,6% | 2008 | 26,9% | 2021 | 24,5% |
| 1996 | 22,4% | 2009 | 30,9% | 2022 | 24,6% |
| 1997 | 21,2% | 2010 | 26,6% | 2023 | 25% |
| 1998 | 23,1% | 2011 | 27,1% | 2024 | 24% |
| 1999 | 24,6% | 2012 | 28,5% | 2025 | 23,4% |
| 2000 | 25,6% | 2013 | 27,8% | 2026 | 22,5% |
| 2001 | 28,2% | 2014 | 26% | | |
| 2002 | 27,1% | 2015 | 24,7% | | |
Tabella dei dati
| 1990 | 39 mld | 2003 | 128 mld | 2016 | 286 mld |
| 1991 | 40,3 mld | 2004 | 134 mld | 2017 | 302 mld |
| 1992 | 46,3 mld | 2005 | 140 mld | 2018 | 330 mld |
| 1993 | 46,2 mld | 2006 | 160 mld | 2019 | 357 mld |
| 1994 | 49,5 mld | 2007 | 180 mld | 2020 | 355 mld |
| 1995 | 54,8 mld | 2008 | 217 mld | 2021 | 379 mld |
| 1996 | 61,9 mld | 2009 | 231 mld | 2022 | 442 mld |
| 1997 | 64,9 mld | 2010 | 222 mld | 2023 | 456 mld |
| 1998 | 71,3 mld | 2011 | 250 mld | 2024 | 464 mld |
| 1999 | 80,7 mld | 2012 | 281 mld | 2025 | 474 mld |
| 2000 | 99,5 mld | 2013 | 287 mld | 2026 | 491 mld |
| 2001 | 108 mld | 2014 | 291 mld | | |
| 2002 | 113 mld | 2015 | 291 mld | | |