Tabella dei dati
| 1991 | 43,3% | 2003 | 46% | 2015 | 73,5% |
| 1992 | 36,4% | 2004 | 46,8% | 2016 | 75,2% |
| 1993 | 31,9% | 2005 | 46,3% | 2017 | 77,1% |
| 1994 | 30,5% | 2006 | 52,6% | 2018 | 77% |
| 1995 | 28% | 2007 | 52,2% | 2019 | 77,9% |
| 1996 | 28,5% | 2008 | 54,2% | 2020 | 95,4% |
| 1997 | 27,8% | 2009 | 65,8% | 2021 | 88% |
| 1998 | 25,7% | 2010 | 66,8% | 2022 | 83,7% |
| 1999 | 28% | 2011 | 65,6% | 2023 | 85% |
| 2000 | 29,6% | 2012 | 70% | 2024 | 87,4% |
| 2001 | 37,8% | 2013 | 69,7% | 2025 | 87,2% |
| 2002 | 43,8% | 2014 | 71,8% | 2026 | 84,5% |
Tabella dei dati
| 1991 | 2,28 mld | 2003 | 6,09 mld | 2015 | 17,2 mld |
| 1992 | 2,11 mld | 2004 | 6,43 mld | 2016 | 18,2 mld |
| 1993 | 2,13 mld | 2005 | 6,8 mld | 2017 | 19,3 mld |
| 1994 | 2,35 mld | 2006 | 8,41 mld | 2018 | 20 mld |
| 1995 | 2,5 mld | 2007 | 8,88 mld | 2019 | 20,9 mld |
| 1996 | 2,74 mld | 2008 | 9,75 mld | 2020 | 23,8 mld |
| 1997 | 2,84 mld | 2009 | 11,6 mld | 2021 | 25,5 mld |
| 1998 | 2,81 mld | 2010 | 12,3 mld | 2022 | 26,7 mld |
| 1999 | 3,16 mld | 2011 | 13,3 mld | 2023 | 28,8 mld |
| 2000 | 3,48 mld | 2012 | 15 mld | 2024 | 30,9 mld |
| 2001 | 4,65 mld | 2013 | 15,3 mld | 2025 | 32,5 mld |
| 2002 | 5,55 mld | 2014 | 16,2 mld | 2026 | 33,7 mld |