Show data table
| 1990 | 22.5% | 2003 | 22.2% | 2016 | 21% |
| 1991 | 19.4% | 2004 | 20.8% | 2017 | 20.8% |
| 1992 | 18% | 2005 | 18.2% | 2018 | 22.2% |
| 1993 | 21.3% | 2006 | 21% | 2019 | 20.5% |
| 1994 | 19.4% | 2007 | 18.3% | 2020 | 21.3% |
| 1995 | 19.2% | 2008 | 16.5% | 2021 | 23.4% |
| 1996 | 24.1% | 2009 | 16% | 2022 | 25.6% |
| 1997 | 20.9% | 2010 | 16.9% | 2023 | 22.3% |
| 1998 | 12.4% | 2011 | 17.1% | 2024 | 22.2% |
| 1999 | 13.1% | 2012 | 23.2% | 2025 | 23.1% |
| 2000 | 15% | 2013 | 19.4% | 2026 | 24.5% |
| 2001 | 15.8% | 2014 | 21.3% | | |
| 2002 | 22.5% | 2015 | 23.2% | | |
Show data table
| 1990 | 2.2B | 2003 | 12B | 2016 | 47.3B |
| 1991 | 2.21B | 2004 | 13B | 2017 | 50.7B |
| 1992 | 2.29B | 2005 | 14.2B | 2018 | 59.2B |
| 1993 | 3.22B | 2006 | 22.2B | 2019 | 59.3B |
| 1994 | 3.16B | 2007 | 20.5B | 2020 | 65.5B |
| 1995 | 3.53B | 2008 | 20.5B | 2021 | 77.8B |
| 1996 | 4.77B | 2009 | 19.8B | 2022 | 90.4B |
| 1997 | 4.46B | 2010 | 26.2B | 2023 | 87.4B |
| 1998 | 4.74B | 2011 | 32.5B | 2024 | 96B |
| 1999 | 5.46B | 2012 | 46.3B | 2025 | 111B |
| 2000 | 6.38B | 2013 | 42.2B | 2026 | 138B |
| 2001 | 7.07B | 2014 | 42.4B | | |
| 2002 | 10.9B | 2015 | 46.5B | | |
Show data table
| 2004 | 23.9% | 2012 | 21.5% | 2020 | 18.5% |
| 2005 | 21.3% | 2013 | 20.1% | 2021 | 20.8% |
| 2006 | 19% | 2014 | 23.9% | 2022 | 28.7% |
| 2007 | 19.7% | 2015 | 25.7% | 2023 | 24.8% |
| 2008 | 19.8% | 2016 | 20.8% | 2024 | 23.6% |
| 2009 | 19.6% | 2017 | 20.3% | 2025 | 23.4% |
| 2010 | 17.3% | 2018 | 19% | 2026 | 24% |
| 2011 | 17% | 2019 | 17.8% | | |
Show data table
| 2004 | 15B | 2012 | 43B | 2020 | 56.9B |
| 2005 | 16.6B | 2013 | 43.7B | 2021 | 69.1B |
| 2006 | 20B | 2014 | 47.7B | 2022 | 101B |
| 2007 | 22.1B | 2015 | 51.4B | 2023 | 97B |
| 2008 | 24.6B | 2016 | 47B | 2024 | 102B |
| 2009 | 24.3B | 2017 | 49.4B | 2025 | 112B |
| 2010 | 26.9B | 2018 | 50.6B | 2026 | 135B |
| 2011 | 32.4B | 2019 | 51.6B | | |