Tabella dei dati
| 1985 | 18,9% | 1999 | 22,5% | 2013 | 20,3% |
| 1986 | 19,5% | 2000 | 19,8% | 2014 | 20,3% |
| 1987 | 20,5% | 2001 | 19% | 2015 | 20,9% |
| 1988 | 20,2% | 2002 | 20% | 2016 | 21,1% |
| 1989 | 19,9% | 2003 | 19,3% | 2017 | 20,9% |
| 1990 | 16,8% | 2004 | 19,9% | 2018 | 22% |
| 1991 | 17,5% | 2005 | 19,3% | 2019 | 21,6% |
| 1992 | 17,6% | 2006 | 19,4% | 2020 | 21,6% |
| 1993 | 21,3% | 2007 | 20,6% | 2021 | 21,3% |
| 1994 | 18,7% | 2008 | 21,6% | 2022 | 21,3% |
| 1995 | 18,9% | 2009 | 21,6% | 2023 | 22,1% |
| 1996 | 18,3% | 2010 | 21,5% | 2024 | 22,6% |
| 1997 | 17,9% | 2011 | 21,5% | 2025 | 22,4% |
| 1998 | 20,8% | 2012 | 20,2% | 2026 | 22,2% |
Tabella dei dati
| 1985 | 152 mln | 1999 | 561 mln | 2013 | 923 mln |
| 1986 | 183 mln | 2000 | 492 mln | 2014 | 968 mln |
| 1987 | 215 mln | 2001 | 458 mln | 2015 | 1,03 mld |
| 1988 | 242 mln | 2002 | 497 mln | 2016 | 1,08 mld |
| 1989 | 274 mln | 2003 | 525 mln | 2017 | 1,14 mld |
| 1990 | 266 mln | 2004 | 582 mln | 2018 | 1,23 mld |
| 1991 | 298 mln | 2005 | 608 mln | 2019 | 1,22 mld |
| 1992 | 322 mln | 2006 | 672 mln | 2020 | 934 mln |
| 1993 | 398 mln | 2007 | 753 mln | 2021 | 1,14 mld |
| 1994 | 367 mln | 2008 | 829 mln | 2022 | 1,35 mld |
| 1995 | 392 mln | 2009 | 827 mln | 2023 | 1,46 mld |
| 1996 | 391 mln | 2010 | 875 mln | 2024 | 1,58 mld |
| 1997 | 399 mln | 2011 | 915 mln | 2025 | 1,62 mld |
| 1998 | 498 mln | 2012 | 879 mln | 2026 | 1,68 mld |
Tabella dei dati
| 1985 | 20,4% | 1999 | 20,9% | 2013 | 24,3% |
| 1986 | 21,1% | 2000 | 20,9% | 2014 | 22,6% |
| 1987 | 19,9% | 2001 | 22% | 2015 | 22,1% |
| 1988 | 18,2% | 2002 | 23% | 2016 | 22,6% |
| 1989 | 19% | 2003 | 22,5% | 2017 | 23% |
| 1990 | 16,5% | 2004 | 22,5% | 2018 | 23,2% |
| 1991 | 18% | 2005 | 25,3% | 2019 | 24,6% |
| 1992 | 18,3% | 2006 | 24,4% | 2020 | 33,1% |
| 1993 | 21,6% | 2007 | 22,2% | 2021 | 26,7% |
| 1994 | 18,7% | 2008 | 22,3% | 2022 | 23,8% |
| 1995 | 19% | 2009 | 24,2% | 2023 | 25,3% |
| 1996 | 18,8% | 2010 | 25,6% | 2024 | 24,4% |
| 1997 | 19% | 2011 | 26,9% | 2025 | 25,2% |
| 1998 | 18,6% | 2012 | 27,1% | 2026 | 25,1% |
Tabella dei dati
| 1985 | 164 mln | 1999 | 521 mln | 2013 | 1,1 mld |
| 1986 | 199 mln | 2000 | 521 mln | 2014 | 1,08 mld |
| 1987 | 209 mln | 2001 | 532 mln | 2015 | 1,09 mld |
| 1988 | 218 mln | 2002 | 572 mln | 2016 | 1,16 mld |
| 1989 | 262 mln | 2003 | 611 mln | 2017 | 1,25 mld |
| 1990 | 262 mln | 2004 | 658 mln | 2018 | 1,3 mld |
| 1991 | 305 mln | 2005 | 797 mln | 2019 | 1,39 mld |
| 1992 | 334 mln | 2006 | 846 mln | 2020 | 1,43 mld |
| 1993 | 402 mln | 2007 | 811 mln | 2021 | 1,43 mld |
| 1994 | 367 mln | 2008 | 857 mln | 2022 | 1,51 mld |
| 1995 | 395 mln | 2009 | 928 mln | 2023 | 1,66 mld |
| 1996 | 403 mln | 2010 | 1,04 mld | 2024 | 1,71 mld |
| 1997 | 423 mln | 2011 | 1,14 mld | 2025 | 1,83 mld |
| 1998 | 445 mln | 2012 | 1,18 mld | 2026 | 1,9 mld |