Show data table
| 1997 | 19.2% | 2007 | 22.1% | 2017 | 23.2% |
| 1998 | 17% | 2008 | 21.4% | 2018 | 25% |
| 1999 | 17.1% | 2009 | 22.9% | 2019 | 25.6% |
| 2000 | 20.6% | 2010 | 22% | 2020 | 22.8% |
| 2001 | 20.3% | 2011 | 21.4% | 2021 | 17.8% |
| 2002 | 20.7% | 2012 | 18.7% | 2022 | 15.3% |
| 2003 | 18.7% | 2013 | 19.2% | 2023 | 18.1% |
| 2004 | 20.8% | 2014 | 19.2% | 2024 | 16.1% |
| 2005 | 21.8% | 2015 | 21% | 2025 | 18.5% |
| 2006 | 22.8% | 2016 | 22% | 2026 | 16% |
Show data table
| 1997 | 43.3B | 2007 | 99.6B | 2017 | 227B |
| 1998 | 38.4B | 2008 | 108B | 2018 | 249B |
| 1999 | 45.4B | 2009 | 121B | 2019 | 276B |
| 2000 | 56.3B | 2010 | 130B | 2020 | 260B |
| 2001 | 57.2B | 2011 | 145B | 2021 | 299B |
| 2002 | 61.4B | 2012 | 156B | 2022 | 469B |
| 2003 | 57.7B | 2013 | 165B | 2023 | 638B |
| 2004 | 68.3B | 2014 | 164B | 2024 | 826B |
| 2005 | 74.7B | 2015 | 186B | 2025 | 1.05T |
| 2006 | 86.8B | 2016 | 203B | 2026 | 1.14T |
Show data table
| 1997 | 20.9% | 2007 | 25.5% | 2017 | 26.3% |
| 1998 | 19.7% | 2008 | 24.1% | 2018 | 27.6% |
| 1999 | 17.6% | 2009 | 25.4% | 2019 | 28.1% |
| 2000 | 22.9% | 2010 | 23.9% | 2020 | 30.5% |
| 2001 | 24% | 2011 | 23.5% | 2021 | 24.8% |
| 2002 | 23.1% | 2012 | 21.8% | 2022 | 20.4% |
| 2003 | 23.5% | 2013 | 21.4% | 2023 | 23.7% |
| 2004 | 23.7% | 2014 | 23.1% | 2024 | 23.3% |
| 2005 | 28.4% | 2015 | 21.7% | 2025 | 23.9% |
| 2006 | 29% | 2016 | 25.2% | 2026 | 22.4% |
Show data table
| 1997 | 47.2B | 2007 | 115B | 2017 | 258B |
| 1998 | 44.4B | 2008 | 122B | 2018 | 274B |
| 1999 | 46.7B | 2009 | 134B | 2019 | 303B |
| 2000 | 62.5B | 2010 | 141B | 2020 | 348B |
| 2001 | 67.7B | 2011 | 160B | 2021 | 415B |
| 2002 | 68.5B | 2012 | 181B | 2022 | 626B |
| 2003 | 72.5B | 2013 | 183B | 2023 | 836B |
| 2004 | 77.7B | 2014 | 197B | 2024 | 1.2T |
| 2005 | 97.1B | 2015 | 192B | 2025 | 1.35T |
| 2006 | 110B | 2016 | 233B | 2026 | 1.59T |