Tabella dei dati
| 1996 | 30,2% | 2007 | 25,3% | 2018 | 21,3% |
| 1997 | 31,6% | 2008 | 22,7% | 2019 | 21,2% |
| 1998 | 37,2% | 2009 | 23,1% | 2020 | 25,5% |
| 1999 | 34,7% | 2010 | 23,5% | 2021 | 26,4% |
| 2000 | 34,1% | 2011 | 23,7% | 2022 | 25,3% |
| 2001 | 33,6% | 2012 | 25% | 2023 | 26,3% |
| 2002 | 37,8% | 2013 | 24,6% | 2024 | 26,1% |
| 2003 | 39,6% | 2014 | 24% | 2025 | 26,5% |
| 2004 | 38,1% | 2015 | 23,4% | 2026 | 27,1% |
| 2005 | 31,3% | 2016 | 22% | | |
| 2006 | 26,6% | 2017 | 22,9% | | |
Tabella dei dati
| 1996 | 2,77 mila mld | 2007 | 10,3 mila mld | 2018 | 28,32 mila mld |
| 1997 | 3,2 mila mld | 2008 | 11,33 mila mld | 2019 | 31,04 mila mld |
| 1998 | 4,36 mila mld | 2009 | 12,26 mila mld | 2020 | 35,95 mila mld |
| 1999 | 4,65 mila mld | 2010 | 13,52 mila mld | 2021 | 39,12 mila mld |
| 2000 | 4,96 mila mld | 2011 | 15,48 mila mld | 2022 | 41,09 mila mld |
| 2001 | 5,45 mila mld | 2012 | 17,87 mila mld | 2023 | 45,73 mila mld |
| 2002 | 6,67 mila mld | 2013 | 19,46 mila mld | 2024 | 49,34 mila mld |
| 2003 | 7,99 mila mld | 2014 | 21,51 mila mld | 2025 | 53,5 mila mld |
| 2004 | 9,15 mila mld | 2015 | 22,88 mila mld | 2026 | 58,22 mila mld |
| 2005 | 9,16 mila mld | 2016 | 23,66 mila mld | | |
| 2006 | 9,16 mila mld | 2017 | 26,92 mila mld | | |