Tabella dei dati
| 1997 | 18,4% | 2007 | 26,1% | 2017 | 27,8% |
| 1998 | 26,8% | 2008 | 26,8% | 2018 | 27,1% |
| 1999 | 28,3% | 2009 | 26,1% | 2019 | 26,9% |
| 2000 | 26,1% | 2010 | 25,9% | 2020 | 25,7% |
| 2001 | 25,8% | 2011 | 25,4% | 2021 | 27,4% |
| 2002 | 25,3% | 2012 | 24,8% | 2022 | 26,6% |
| 2003 | 24,7% | 2013 | 24% | 2023 | 27,2% |
| 2004 | 25% | 2014 | 26,3% | 2024 | 28,2% |
| 2005 | 25,4% | 2015 | 26,4% | 2025 | 28,3% |
| 2006 | 25,9% | 2016 | 27,6% | 2026 | 29% |
Tabella dei dati
| 1997 | 61 mld | 2007 | 252 mld | 2017 | 430 mld |
| 1998 | 103 mld | 2008 | 290 mld | 2018 | 450 mld |
| 1999 | 125 mld | 2009 | 298 mld | 2019 | 460 mld |
| 2000 | 131 mld | 2010 | 321 mld | 2020 | 426 mld |
| 2001 | 146 mld | 2011 | 330 mld | 2021 | 511 mld |
| 2002 | 155 mld | 2012 | 330 mld | 2022 | 573 mld |
| 2003 | 167 mld | 2013 | 324 mld | 2023 | 644 mld |
| 2004 | 184 mld | 2014 | 367 mld | 2024 | 710 mld |
| 2005 | 205 mld | 2015 | 379 mld | 2025 | 755 mld |
| 2006 | 226 mld | 2016 | 407 mld | 2026 | 821 mld |
Tabella dei dati
| 1997 | 30,3% | 2007 | 29,3% | 2017 | 29,2% |
| 1998 | 36,8% | 2008 | 31,7% | 2018 | 28,7% |
| 1999 | 37,1% | 2009 | 32,7% | 2019 | 28,7% |
| 2000 | 33,8% | 2010 | 29,4% | 2020 | 32,4% |
| 2001 | 32,7% | 2011 | 28,9% | 2021 | 31,9% |
| 2002 | 31,5% | 2012 | 28,2% | 2022 | 30,3% |
| 2003 | 29,7% | 2013 | 29,2% | 2023 | 28,5% |
| 2004 | 30,2% | 2014 | 31,7% | 2024 | 28,9% |
| 2005 | 28,9% | 2015 | 30,8% | 2025 | 30,1% |
| 2006 | 29,2% | 2016 | 29,1% | 2026 | 31% |
Tabella dei dati
| 1997 | 100 mld | 2007 | 283 mld | 2017 | 452 mld |
| 1998 | 141 mld | 2008 | 343 mld | 2018 | 476 mld |
| 1999 | 165 mld | 2009 | 374 mld | 2019 | 492 mld |
| 2000 | 170 mld | 2010 | 364 mld | 2020 | 536 mld |
| 2001 | 184 mld | 2011 | 376 mld | 2021 | 596 mld |
| 2002 | 193 mld | 2012 | 376 mld | 2022 | 651 mld |
| 2003 | 201 mld | 2013 | 394 mld | 2023 | 675 mld |
| 2004 | 222 mld | 2014 | 443 mld | 2024 | 729 mld |
| 2005 | 232 mld | 2015 | 441 mld | 2025 | 801 mld |
| 2006 | 255 mld | 2016 | 429 mld | 2026 | 878 mld |