Tabella dei dati
| 1998 | 12% | 2008 | 22,1% | 2018 | 28,2% |
| 1999 | 13,5% | 2009 | 23,4% | 2019 | 26,8% |
| 2000 | 13,6% | 2010 | 23,2% | 2020 | 24,8% |
| 2001 | 15,2% | 2011 | 24,9% | 2021 | 27% |
| 2002 | 16,7% | 2012 | 25,1% | 2022 | 27,1% |
| 2003 | 17,3% | 2013 | 26,9% | 2023 | 27,1% |
| 2004 | 17,9% | 2014 | 28,4% | 2024 | 27,5% |
| 2005 | 20,1% | 2015 | 29,9% | 2025 | 27,5% |
| 2006 | 23,6% | 2016 | 29,7% | 2026 | 26,9% |
| 2007 | 22,5% | 2017 | 28,1% | | |
Tabella dei dati
| 1998 | 124 mln | 2008 | 3,9 mld | 2018 | 20 mld |
| 1999 | 182 mln | 2009 | 4,83 mld | 2019 | 21,2 mld |
| 2000 | 246 mln | 2010 | 5,72 mld | 2020 | 20,8 mld |
| 2001 | 382 mln | 2011 | 7,48 mld | 2021 | 27,3 mld |
| 2002 | 560 mln | 2012 | 9,09 mld | 2022 | 32,1 mld |
| 2003 | 824 mln | 2013 | 10,9 mld | 2023 | 36 mld |
| 2004 | 1,1 mld | 2014 | 12,9 mld | 2024 | 42,9 mld |
| 2005 | 1,45 mld | 2015 | 14,5 mld | 2025 | 48,3 mld |
| 2006 | 2,19 mld | 2016 | 16,3 mld | 2026 | 52,5 mld |
| 2007 | 2,87 mld | 2017 | 18,1 mld | | |
Tabella dei dati
| 1998 | 17,1% | 2008 | 20,2% | 2018 | 30,9% |
| 1999 | 17,5% | 2009 | 23,6% | 2019 | 28,8% |
| 2000 | 18,1% | 2010 | 25,9% | 2020 | 29,2% |
| 2001 | 17,3% | 2011 | 24,3% | 2021 | 27,6% |
| 2002 | 19,1% | 2012 | 24,7% | 2022 | 27,4% |
| 2003 | 19,1% | 2013 | 27,7% | 2023 | 28% |
| 2004 | 20,2% | 2014 | 27,5% | 2024 | 27,2% |
| 2005 | 22,9% | 2015 | 31,9% | 2025 | 29,3% |
| 2006 | 21,6% | 2016 | 32,7% | 2026 | 29,4% |
| 2007 | 20,3% | 2017 | 33,8% | | |
Tabella dei dati
| 1998 | 176 mln | 2008 | 3,55 mld | 2018 | 21,9 mld |
| 1999 | 236 mln | 2009 | 4,87 mld | 2019 | 22,8 mld |
| 2000 | 327 mln | 2010 | 6,39 mld | 2020 | 24,5 mld |
| 2001 | 435 mln | 2011 | 7,3 mld | 2021 | 27,9 mld |
| 2002 | 640 mln | 2012 | 8,94 mld | 2022 | 32,4 mld |
| 2003 | 907 mln | 2013 | 11,2 mld | 2023 | 37,2 mld |
| 2004 | 1,25 mld | 2014 | 12,5 mld | 2024 | 42,4 mld |
| 2005 | 1,65 mld | 2015 | 15,4 mld | 2025 | 51,4 mld |
| 2006 | 2,01 mld | 2016 | 17,9 mld | 2026 | 57,4 mld |
| 2007 | 2,6 mld | 2017 | 21,8 mld | | |