Tabella dei dati
| 1990 | 22,5% | 2003 | 22,2% | 2016 | 21% |
| 1991 | 19,4% | 2004 | 20,8% | 2017 | 20,8% |
| 1992 | 18% | 2005 | 18,2% | 2018 | 22,2% |
| 1993 | 21,3% | 2006 | 21% | 2019 | 20,5% |
| 1994 | 19,4% | 2007 | 18,3% | 2020 | 21,3% |
| 1995 | 19,2% | 2008 | 16,5% | 2021 | 23,4% |
| 1996 | 24,1% | 2009 | 16% | 2022 | 25,6% |
| 1997 | 20,9% | 2010 | 16,9% | 2023 | 22,3% |
| 1998 | 12,4% | 2011 | 17,1% | 2024 | 22,2% |
| 1999 | 13,1% | 2012 | 23,2% | 2025 | 23,1% |
| 2000 | 15% | 2013 | 19,4% | 2026 | 24,5% |
| 2001 | 15,8% | 2014 | 21,3% | | |
| 2002 | 22,5% | 2015 | 23,2% | | |
Tabella dei dati
| 1990 | 2,2 mld | 2003 | 12 mld | 2016 | 47,3 mld |
| 1991 | 2,21 mld | 2004 | 13 mld | 2017 | 50,7 mld |
| 1992 | 2,29 mld | 2005 | 14,2 mld | 2018 | 59,2 mld |
| 1993 | 3,22 mld | 2006 | 22,2 mld | 2019 | 59,3 mld |
| 1994 | 3,16 mld | 2007 | 20,5 mld | 2020 | 65,5 mld |
| 1995 | 3,53 mld | 2008 | 20,5 mld | 2021 | 77,8 mld |
| 1996 | 4,77 mld | 2009 | 19,8 mld | 2022 | 90,4 mld |
| 1997 | 4,46 mld | 2010 | 26,2 mld | 2023 | 87,4 mld |
| 1998 | 4,74 mld | 2011 | 32,5 mld | 2024 | 96 mld |
| 1999 | 5,46 mld | 2012 | 46,3 mld | 2025 | 111 mld |
| 2000 | 6,38 mld | 2013 | 42,2 mld | 2026 | 138 mld |
| 2001 | 7,07 mld | 2014 | 42,4 mld | | |
| 2002 | 10,9 mld | 2015 | 46,5 mld | | |
Tabella dei dati
| 2004 | 23,9% | 2012 | 21,5% | 2020 | 18,5% |
| 2005 | 21,3% | 2013 | 20,1% | 2021 | 20,8% |
| 2006 | 19% | 2014 | 23,9% | 2022 | 28,7% |
| 2007 | 19,7% | 2015 | 25,7% | 2023 | 24,8% |
| 2008 | 19,8% | 2016 | 20,8% | 2024 | 23,6% |
| 2009 | 19,6% | 2017 | 20,3% | 2025 | 23,4% |
| 2010 | 17,3% | 2018 | 19% | 2026 | 24% |
| 2011 | 17% | 2019 | 17,8% | | |
Tabella dei dati
| 2004 | 15 mld | 2012 | 43 mld | 2020 | 56,9 mld |
| 2005 | 16,6 mld | 2013 | 43,7 mld | 2021 | 69,1 mld |
| 2006 | 20 mld | 2014 | 47,7 mld | 2022 | 101 mld |
| 2007 | 22,1 mld | 2015 | 51,4 mld | 2023 | 97 mld |
| 2008 | 24,6 mld | 2016 | 47 mld | 2024 | 102 mld |
| 2009 | 24,3 mld | 2017 | 49,4 mld | 2025 | 112 mld |
| 2010 | 26,9 mld | 2018 | 50,6 mld | 2026 | 135 mld |
| 2011 | 32,4 mld | 2019 | 51,6 mld | | |