Show data table
| 1997 | 26.7% | 2007 | 18.6% | 2017 | 14.9% |
| 1998 | 27.2% | 2008 | 22.4% | 2018 | 13.5% |
| 1999 | 23.3% | 2009 | 21.9% | 2019 | 13.2% |
| 2000 | 25.3% | 2010 | 16.7% | 2020 | 13.4% |
| 2001 | 23.4% | 2011 | 19.2% | 2021 | 13.9% |
| 2002 | 19.6% | 2012 | 22.2% | 2022 | 16.4% |
| 2003 | 24.8% | 2013 | 18.4% | 2023 | 13.8% |
| 2004 | 21.7% | 2014 | 17.9% | 2024 | 14.4% |
| 2005 | 22% | 2015 | 16.6% | 2025 | 14.2% |
| 2006 | 21.7% | 2016 | 11.7% | 2026 | 13.8% |
Show data table
| 1997 | 552M | 2007 | 4.68B | 2017 | 19.8B |
| 1998 | 710M | 2008 | 10.3B | 2018 | 19.3B |
| 1999 | 871M | 2009 | 11.8B | 2019 | 20.8B |
| 2000 | 1.23B | 2010 | 10.2B | 2020 | 21.3B |
| 2001 | 1.57B | 2011 | 15.2B | 2021 | 24.1B |
| 2002 | 1.65B | 2012 | 22.2B | 2022 | 32.5B |
| 2003 | 2.74B | 2013 | 20.6B | 2023 | 30.4B |
| 2004 | 2.99B | 2014 | 22.2B | 2024 | 34.7B |
| 2005 | 3.66B | 2015 | 20.8B | 2025 | 38.5B |
| 2006 | 4.5B | 2016 | 14.9B | 2026 | 40.2B |
Show data table
| 1997 | 26.9% | 2007 | 14.4% | 2017 | 17.8% |
| 1998 | 26.1% | 2008 | 11.7% | 2018 | 13.7% |
| 1999 | 20.8% | 2009 | 14.4% | 2019 | 13.6% |
| 2000 | 25.9% | 2010 | 14.6% | 2020 | 13.5% |
| 2001 | 22.6% | 2011 | 15.4% | 2021 | 13.4% |
| 2002 | 19.4% | 2012 | 14.7% | 2022 | 13% |
| 2003 | 20.8% | 2013 | 16.9% | 2023 | 13.7% |
| 2004 | 20.3% | 2014 | 17% | 2024 | 14.5% |
| 2005 | 21.1% | 2015 | 17.3% | 2025 | 14.1% |
| 2006 | 16% | 2016 | 14.1% | 2026 | 13.5% |
Show data table
| 1997 | 556M | 2007 | 3.63B | 2017 | 23.6B |
| 1998 | 680M | 2008 | 5.38B | 2018 | 19.6B |
| 1999 | 778M | 2009 | 7.72B | 2019 | 21.5B |
| 2000 | 1.26B | 2010 | 8.88B | 2020 | 21.6B |
| 2001 | 1.52B | 2011 | 12.2B | 2021 | 23.2B |
| 2002 | 1.63B | 2012 | 14.7B | 2022 | 25.8B |
| 2003 | 2.3B | 2013 | 18.9B | 2023 | 30.1B |
| 2004 | 2.79B | 2014 | 21.1B | 2024 | 34.9B |
| 2005 | 3.51B | 2015 | 21.7B | 2025 | 38.3B |
| 2006 | 3.33B | 2016 | 17.9B | 2026 | 39.2B |