Tabella dei dati
| 1990 | 25,6% | 2003 | 26,4% | 2016 | 16,7% |
| 1991 | 25,1% | 2004 | 25,2% | 2017 | 17,3% |
| 1992 | 24% | 2005 | 26,7% | 2018 | 20,8% |
| 1993 | 23,9% | 2006 | 25,4% | 2019 | 22,7% |
| 1994 | 21% | 2007 | 23,9% | 2020 | 17,3% |
| 1995 | 21,1% | 2008 | 26,8% | 2021 | 20,1% |
| 1996 | 22,9% | 2009 | 19,2% | 2022 | 22,4% |
| 1997 | 24,6% | 2010 | 21,8% | 2023 | 19,4% |
| 1998 | 20,2% | 2011 | 25,3% | 2024 | 17,9% |
| 1999 | 22,2% | 2012 | 25,3% | 2025 | 16,4% |
| 2000 | 29,5% | 2013 | 23,4% | 2026 | 20% |
| 2001 | 27,2% | 2014 | 24% | | |
| 2002 | 27,3% | 2015 | 17,4% | | |
Tabella dei dati
| 1990 | 498 mln | 2003 | 1,15 mld | 2016 | 2,13 mld |
| 1991 | 512 mln | 2004 | 1,3 mld | 2017 | 2,42 mld |
| 1992 | 512 mln | 2005 | 1,67 mld | 2018 | 3,09 mld |
| 1993 | 562 mln | 2006 | 1,84 mld | 2019 | 3,45 mld |
| 1994 | 527 mln | 2007 | 2,04 mld | 2020 | 2,33 mld |
| 1995 | 561 mln | 2008 | 2,7 mld | 2021 | 3,08 mld |
| 1996 | 634 mln | 2009 | 1,73 mld | 2022 | 3,91 mld |
| 1997 | 706 mln | 2010 | 2,2 mld | 2023 | 3,36 mld |
| 1998 | 554 mln | 2011 | 2,84 mld | 2024 | 3,18 mld |
| 1999 | 660 mln | 2012 | 3,05 mld | 2025 | 2,94 mld |
| 2000 | 1,05 mld | 2013 | 2,98 mld | 2026 | 3,67 mld |
| 2001 | 981 mln | 2014 | 3,13 mld | | |
| 2002 | 1,03 mld | 2015 | 2,13 mld | | |
Tabella dei dati
| 1990 | 32,4% | 2003 | 28,1% | 2016 | 33,3% |
| 1991 | 28,5% | 2004 | 25% | 2017 | 30,7% |
| 1992 | 29,4% | 2005 | 23,9% | 2018 | 32,1% |
| 1993 | 26,7% | 2006 | 23,1% | 2019 | 31,2% |
| 1994 | 26,1% | 2007 | 22,4% | 2020 | 34,6% |
| 1995 | 25,1% | 2008 | 22,7% | 2021 | 30,6% |
| 1996 | 22,7% | 2009 | 24,6% | 2022 | 28,4% |
| 1997 | 31% | 2010 | 31,1% | 2023 | 29% |
| 1998 | 25,7% | 2011 | 30,2% | 2024 | 28,9% |
| 1999 | 27,1% | 2012 | 31,1% | 2025 | 29,4% |
| 2000 | 22,2% | 2013 | 32% | 2026 | 30,6% |
| 2001 | 26,5% | 2014 | 27,3% | | |
| 2002 | 30,6% | 2015 | 34,8% | | |
Tabella dei dati
| 1990 | 630 mln | 2003 | 1,22 mld | 2016 | 4,24 mld |
| 1991 | 583 mln | 2004 | 1,29 mld | 2017 | 4,29 mld |
| 1992 | 627 mln | 2005 | 1,5 mld | 2018 | 4,77 mld |
| 1993 | 626 mln | 2006 | 1,68 mld | 2019 | 4,75 mld |
| 1994 | 657 mln | 2007 | 1,91 mld | 2020 | 4,66 mld |
| 1995 | 667 mln | 2008 | 2,29 mld | 2021 | 4,7 mld |
| 1996 | 627 mln | 2009 | 2,21 mld | 2022 | 4,96 mld |
| 1997 | 889 mln | 2010 | 3,13 mld | 2023 | 5,04 mld |
| 1998 | 705 mln | 2011 | 3,39 mld | 2024 | 5,13 mld |
| 1999 | 805 mln | 2012 | 3,74 mld | 2025 | 5,26 mld |
| 2000 | 787 mln | 2013 | 4,06 mld | 2026 | 5,62 mld |
| 2001 | 956 mln | 2014 | 3,57 mld | | |
| 2002 | 1,15 mld | 2015 | 4,26 mld | | |