Tabella dei dati
| 1991 | 42% | 2003 | 79,6% | 2015 | 90,1% |
| 1992 | 40,1% | 2004 | 94,7% | 2016 | 81,6% |
| 1993 | 45,3% | 2005 | 87,3% | 2017 | 70,3% |
| 1994 | 45,7% | 2006 | 92,9% | 2018 | 68,5% |
| 1995 | 43,1% | 2007 | 89,1% | 2019 | 62,7% |
| 1996 | 43,9% | 2008 | 83,9% | 2020 | 89,5% |
| 1997 | 41,4% | 2009 | 91,1% | 2021 | 86,6% |
| 1998 | 40,3% | 2010 | 96,2% | 2022 | 79,3% |
| 1999 | 34,5% | 2011 | 102,8% | 2023 | 74,5% |
| 2000 | 41,6% | 2012 | 101,5% | 2024 | 75,1% |
| 2001 | 44,6% | 2013 | 105,4% | 2025 | 71,6% |
| 2002 | 79,1% | 2014 | 99,3% | 2026 | 69% |
Tabella dei dati
| 1991 | 341 mln | 2003 | 1,27 mld | 2015 | 2,43 mld |
| 1992 | 336 mln | 2004 | 1,53 mld | 2016 | 2,34 mld |
| 1993 | 379 mln | 2005 | 1,64 mld | 2017 | 2,14 mld |
| 1994 | 401 mln | 2006 | 1,75 mld | 2018 | 2,16 mld |
| 1995 | 398 mln | 2007 | 1,82 mld | 2019 | 2,05 mld |
| 1996 | 435 mln | 2008 | 1,87 mld | 2020 | 2,52 mld |
| 1997 | 439 mln | 2009 | 1,9 mld | 2021 | 2,62 mld |
| 1998 | 485 mln | 2010 | 2 mld | 2022 | 2,62 mld |
| 1999 | 449 mln | 2011 | 2,16 mld | 2023 | 2,69 mld |
| 2000 | 584 mln | 2012 | 2,19 mld | 2024 | 2,74 mld |
| 2001 | 627 mln | 2013 | 2,4 mld | 2025 | 2,75 mld |
| 2002 | 1,15 mld | 2014 | 2,45 mld | 2026 | 2,76 mld |