Tabella dei dati
| 1998 | 58,9% | 2008 | 28,2% | 2018 | 49,4% |
| 1999 | 59,4% | 2009 | 33,3% | 2019 | 44,3% |
| 2000 | 55,8% | 2010 | 40,3% | 2020 | 43,2% |
| 2001 | 53,8% | 2011 | 41,5% | 2021 | 45,4% |
| 2002 | 50,3% | 2012 | 50,9% | 2022 | 41% |
| 2003 | 42,8% | 2013 | 54,1% | 2023 | 31,8% |
| 2004 | 39,8% | 2014 | 54,9% | 2024 | 25,2% |
| 2005 | 34,2% | 2015 | 56,4% | 2025 | 21,2% |
| 2006 | 33,5% | 2016 | 49% | 2026 | 17,1% |
| 2007 | 31,5% | 2017 | 46,7% | | |
Tabella dei dati
| 1998 | 464 mln | 2008 | 490 mln | 2018 | 1,11 mld |
| 1999 | 467 mln | 2009 | 585 mln | 2019 | 1,06 mld |
| 2000 | 470 mln | 2010 | 695 mln | 2020 | 1,01 mld |
| 2001 | 503 mln | 2011 | 738 mln | 2021 | 1 mld |
| 2002 | 505 mln | 2012 | 906 mln | 2022 | 949 mln |
| 2003 | 463 mln | 2013 | 986 mln | 2023 | 908 mln |
| 2004 | 476 mln | 2014 | 1,02 mld | 2024 | 815 mln |
| 2005 | 453 mln | 2015 | 1,13 mld | 2025 | 760 mln |
| 2006 | 477 mln | 2016 | 1,08 mld | 2026 | 655 mln |
| 2007 | 484 mln | 2017 | 1,05 mld | | |