Tabella dei dati
| 1997 | 26,2% | 2007 | 24,4% | 2017 | 22,5% |
| 1998 | 24% | 2008 | 33,9% | 2018 | 24,1% |
| 1999 | 24,1% | 2009 | 19,4% | 2019 | 26,5% |
| 2000 | 32,5% | 2010 | 24,9% | 2020 | 22,3% |
| 2001 | 28,8% | 2011 | 22,3% | 2021 | 28,4% |
| 2002 | 32% | 2012 | 24,1% | 2022 | 29,2% |
| 2003 | 37,8% | 2013 | 25,1% | 2023 | 27,8% |
| 2004 | 30,4% | 2014 | 21,4% | 2024 | 15,5% |
| 2005 | 29,7% | 2015 | 23,9% | 2025 | 12,3% |
| 2006 | 32,2% | 2016 | 24,4% | 2026 | 10,7% |
Tabella dei dati
| 1997 | 24,4 mld | 2007 | 87 mld | 2017 | 222 mld |
| 1998 | 26,1 mld | 2008 | 136 mld | 2018 | 260 mld |
| 1999 | 28,8 mld | 2009 | 91,6 mld | 2019 | 330 mld |
| 2000 | 43,4 mld | 2010 | 119 mld | 2020 | 324 mld |
| 2001 | 43,4 mld | 2011 | 117 mld | 2021 | 483 mld |
| 2002 | 52,4 mld | 2012 | 137 mld | 2022 | 632 mld |
| 2003 | 73,8 mld | 2013 | 161 mld | 2023 | 779 mld |
| 2004 | 72,9 mld | 2014 | 144 mld | 2024 | 517 mld |
| 2005 | 83,2 mld | 2015 | 172 mld | 2025 | 516 mld |
| 2006 | 100 mld | 2016 | 206 mld | 2026 | 549 mld |