Show data table
| 1997 | 26.2% | 2007 | 24.4% | 2017 | 22.5% |
| 1998 | 24% | 2008 | 33.9% | 2018 | 24.1% |
| 1999 | 24.1% | 2009 | 19.4% | 2019 | 26.5% |
| 2000 | 32.5% | 2010 | 24.9% | 2020 | 22.3% |
| 2001 | 28.8% | 2011 | 22.3% | 2021 | 28.4% |
| 2002 | 32% | 2012 | 24.1% | 2022 | 29.2% |
| 2003 | 37.8% | 2013 | 25.1% | 2023 | 27.8% |
| 2004 | 30.4% | 2014 | 21.4% | 2024 | 15.5% |
| 2005 | 29.7% | 2015 | 23.9% | 2025 | 12.3% |
| 2006 | 32.2% | 2016 | 24.4% | 2026 | 10.7% |
Show data table
| 1997 | 24.4B | 2007 | 87B | 2017 | 222B |
| 1998 | 26.1B | 2008 | 136B | 2018 | 260B |
| 1999 | 28.8B | 2009 | 91.6B | 2019 | 330B |
| 2000 | 43.4B | 2010 | 119B | 2020 | 324B |
| 2001 | 43.4B | 2011 | 117B | 2021 | 483B |
| 2002 | 52.4B | 2012 | 137B | 2022 | 632B |
| 2003 | 73.8B | 2013 | 161B | 2023 | 779B |
| 2004 | 72.9B | 2014 | 144B | 2024 | 517B |
| 2005 | 83.2B | 2015 | 172B | 2025 | 516B |
| 2006 | 100B | 2016 | 206B | 2026 | 549B |