Tabella dei dati
| 1997 | 31,9% | 2007 | 32% | 2017 | 29% |
| 1998 | 30,6% | 2008 | 32,8% | 2018 | 28,5% |
| 1999 | 32,5% | 2009 | 30,9% | 2019 | 29,4% |
| 2000 | 34,4% | 2010 | 30,1% | 2020 | 28,4% |
| 2001 | 31,5% | 2011 | 29,4% | 2021 | 30% |
| 2002 | 33% | 2012 | 29,5% | 2022 | 29,8% |
| 2003 | 35,9% | 2013 | 27,8% | 2023 | 30,7% |
| 2004 | 34,5% | 2014 | 27,5% | 2024 | 31,8% |
| 2005 | 32,7% | 2015 | 28,7% | 2025 | 32,2% |
| 2006 | 30,9% | 2016 | 28,4% | 2026 | 32% |
Tabella dei dati
| 1997 | 63,7 mld | 2007 | 119 mld | 2017 | 179 mld |
| 1998 | 63,9 mld | 2008 | 136 mld | 2018 | 188 mld |
| 1999 | 73 mld | 2009 | 128 mld | 2019 | 204 mld |
| 2000 | 85,5 mld | 2010 | 132 mld | 2020 | 190 mld |
| 2001 | 79,5 mld | 2011 | 136 mld | 2021 | 219 mld |
| 2002 | 85,2 mld | 2012 | 137 mld | 2022 | 243 mld |
| 2003 | 96,5 mld | 2013 | 140 mld | 2023 | 277 mld |
| 2004 | 96,8 mld | 2014 | 145 mld | 2024 | 306 mld |
| 2005 | 101 mld | 2015 | 161 mld | 2025 | 336 mld |
| 2006 | 104 mld | 2016 | 169 mld | 2026 | 361 mld |
Tabella dei dati
| 1997 | 32,3% | 2007 | 31,4% | 2017 | 31,8% |
| 1998 | 32,2% | 2008 | 33,8% | 2018 | 30,3% |
| 1999 | 32,5% | 2009 | 33,6% | 2019 | 31,4% |
| 2000 | 32% | 2010 | 32,5% | 2020 | 36,4% |
| 2001 | 37,4% | 2011 | 31,9% | 2021 | 35,3% |
| 2002 | 38,2% | 2012 | 33,3% | 2022 | 35% |
| 2003 | 36% | 2013 | 31,7% | 2023 | 35,3% |
| 2004 | 34,1% | 2014 | 31,7% | 2024 | 36,1% |
| 2005 | 32,5% | 2015 | 32,2% | 2025 | 36,2% |
| 2006 | 31,5% | 2016 | 31,1% | 2026 | 36,2% |
Tabella dei dati
| 1997 | 64,4 mld | 2007 | 117 mld | 2017 | 196 mld |
| 1998 | 67,3 mld | 2008 | 140 mld | 2018 | 200 mld |
| 1999 | 73 mld | 2009 | 139 mld | 2019 | 218 mld |
| 2000 | 79,6 mld | 2010 | 142 mld | 2020 | 244 mld |
| 2001 | 94,3 mld | 2011 | 148 mld | 2021 | 257 mld |
| 2002 | 98,8 mld | 2012 | 155 mld | 2022 | 286 mld |
| 2003 | 96,7 mld | 2013 | 159 mld | 2023 | 319 mld |
| 2004 | 95,8 mld | 2014 | 167 mld | 2024 | 349 mld |
| 2005 | 100 mld | 2015 | 180 mld | 2025 | 378 mld |
| 2006 | 105 mld | 2016 | 185 mld | 2026 | 408 mld |