Tabella dei dati
| 1995 | 25,5% | 2006 | 22,3% | 2017 | 22% |
| 1996 | 25,1% | 2007 | 21,6% | 2018 | 22,2% |
| 1997 | 22,9% | 2008 | 26,8% | 2019 | 23,8% |
| 1998 | 21,7% | 2009 | 24,3% | 2020 | 24,9% |
| 1999 | 22,9% | 2010 | 27% | 2021 | 21,2% |
| 2000 | 22,3% | 2011 | 20,8% | 2022 | 22,6% |
| 2001 | 21,7% | 2012 | 21,8% | 2023 | 24,8% |
| 2002 | 21,5% | 2013 | 23,4% | 2024 | 24,5% |
| 2003 | 27% | 2014 | 22,4% | 2025 | 23,7% |
| 2004 | 20,7% | 2015 | 23,9% | 2026 | 23,3% |
| 2005 | 21,5% | 2016 | 23,7% | | |
Tabella dei dati
| 1995 | 603 mln | 2006 | 985 mln | 2017 | 1,22 mld |
| 1996 | 620 mln | 2007 | 1,03 mld | 2018 | 1,3 mld |
| 1997 | 628 mln | 2008 | 1,37 mld | 2019 | 1,43 mld |
| 1998 | 646 mln | 2009 | 1,11 mld | 2020 | 1,1 mld |
| 1999 | 706 mln | 2010 | 1,18 mld | 2021 | 1,09 mld |
| 2000 | 746 mln | 2011 | 981 mln | 2022 | 1,35 mld |
| 2001 | 736 mln | 2012 | 1,02 mld | 2023 | 1,72 mld |
| 2002 | 755 mln | 2013 | 1,14 mld | 2024 | 1,88 mld |
| 2003 | 989 mln | 2014 | 1,12 mld | 2025 | 1,92 mld |
| 2004 | 836 mln | 2015 | 1,27 mld | 2026 | 1,95 mld |
| 2005 | 909 mln | 2016 | 1,26 mld | | |
Tabella dei dati
| 1995 | 26,3% | 2006 | 24,8% | 2017 | 24,6% |
| 1996 | 27,5% | 2007 | 22,6% | 2018 | 24,9% |
| 1997 | 25% | 2008 | 25,4% | 2019 | 24% |
| 1998 | 21,6% | 2009 | 26,9% | 2020 | 41,7% |
| 1999 | 22,8% | 2010 | 30,4% | 2021 | 31,1% |
| 2000 | 21,6% | 2011 | 27,2% | 2022 | 23,1% |
| 2001 | 22,5% | 2012 | 30,8% | 2023 | 21,8% |
| 2002 | 24,7% | 2013 | 29,5% | 2024 | 20,8% |
| 2003 | 25,1% | 2014 | 29,8% | 2025 | 21,8% |
| 2004 | 29,2% | 2015 | 25,4% | 2026 | 21,4% |
| 2005 | 24,5% | 2016 | 25,1% | | |
Tabella dei dati
| 1995 | 622 mln | 2006 | 1,1 mld | 2017 | 1,36 mld |
| 1996 | 678 mln | 2007 | 1,08 mld | 2018 | 1,46 mld |
| 1997 | 685 mln | 2008 | 1,29 mld | 2019 | 1,44 mld |
| 1998 | 643 mln | 2009 | 1,23 mld | 2020 | 1,84 mld |
| 1999 | 703 mln | 2010 | 1,34 mld | 2021 | 1,6 mld |
| 2000 | 725 mln | 2011 | 1,28 mld | 2022 | 1,38 mld |
| 2001 | 764 mln | 2012 | 1,44 mld | 2023 | 1,51 mld |
| 2002 | 866 mln | 2013 | 1,44 mld | 2024 | 1,59 mld |
| 2003 | 920 mln | 2014 | 1,49 mld | 2025 | 1,77 mld |
| 2004 | 1,18 mld | 2015 | 1,35 mld | 2026 | 1,79 mld |
| 2005 | 1,03 mld | 2016 | 1,34 mld | | |