Tabella dei dati
| 1998 | 37,4% | 2008 | 34,9% | 2018 | 38,6% |
| 1999 | 36,9% | 2009 | 36,5% | 2019 | 38,6% |
| 2000 | 34,5% | 2010 | 37% | 2020 | 38,8% |
| 2001 | 33% | 2011 | 37,9% | 2021 | 38,9% |
| 2002 | 32,8% | 2012 | 38,7% | 2022 | 39,6% |
| 2003 | 32,8% | 2013 | 38,1% | 2023 | 39,5% |
| 2004 | 33,8% | 2014 | 37,4% | 2024 | 42,2% |
| 2005 | 34,7% | 2015 | 37,1% | 2025 | 41,3% |
| 2006 | 35,1% | 2016 | 37% | 2026 | 41,5% |
| 2007 | 35,4% | 2017 | 37% | | |
Tabella dei dati
| 1998 | 2,19 mld | 2008 | 8,15 mld | 2018 | 10,9 mld |
| 1999 | 2,25 mld | 2009 | 6,74 mld | 2019 | 11,4 mld |
| 2000 | 2,31 mld | 2010 | 6,56 mld | 2020 | 11,3 mld |
| 2001 | 2,41 mld | 2011 | 7,24 mld | 2021 | 12,5 mld |
| 2002 | 2,67 mld | 2012 | 8,18 mld | 2022 | 14,3 mld |
| 2003 | 3 mld | 2013 | 8,36 mld | 2023 | 15,6 mld |
| 2004 | 3,59 mld | 2014 | 8,53 mld | 2024 | 17,2 mld |
| 2005 | 4,55 mld | 2015 | 8,82 mld | 2025 | 17,8 mld |
| 2006 | 5,71 mld | 2016 | 9,07 mld | 2026 | 18,9 mld |
| 2007 | 7,61 mld | 2017 | 9,62 mld | | |
Tabella dei dati
| 1998 | 38,1% | 2008 | 38,2% | 2018 | 39,4% |
| 1999 | 40,4% | 2009 | 43,6% | 2019 | 39% |
| 2000 | 37% | 2010 | 43,6% | 2020 | 42,6% |
| 2001 | 35% | 2011 | 41,2% | 2021 | 44,6% |
| 2002 | 35,4% | 2012 | 38,6% | 2022 | 43,6% |
| 2003 | 34,4% | 2013 | 38,7% | 2023 | 42,9% |
| 2004 | 34,8% | 2014 | 39,2% | 2024 | 44% |
| 2005 | 35,8% | 2015 | 38,7% | 2025 | 45,4% |
| 2006 | 35,5% | 2016 | 37,4% | 2026 | 44,9% |
| 2007 | 34,8% | 2017 | 37,8% | | |
Tabella dei dati
| 1998 | 2,23 mld | 2008 | 8,92 mld | 2018 | 11,1 mld |
| 1999 | 2,47 mld | 2009 | 8,06 mld | 2019 | 11,5 mld |
| 2000 | 2,48 mld | 2010 | 7,72 mld | 2020 | 12,5 mld |
| 2001 | 2,56 mld | 2011 | 7,88 mld | 2021 | 14,4 mld |
| 2002 | 2,88 mld | 2012 | 8,14 mld | 2022 | 15,7 mld |
| 2003 | 3,15 mld | 2013 | 8,49 mld | 2023 | 17 mld |
| 2004 | 3,7 mld | 2014 | 8,93 mld | 2024 | 17,9 mld |
| 2005 | 4,69 mld | 2015 | 9,19 mld | 2025 | 19,5 mld |
| 2006 | 5,79 mld | 2016 | 9,17 mld | 2026 | 20,4 mld |
| 2007 | 7,48 mld | 2017 | 9,84 mld | | |