Show data table
| 1995 | 38.2% | 2006 | 36.3% | 2017 | 25% |
| 1996 | 38.3% | 2007 | 35.9% | 2018 | 24.8% |
| 1997 | 37.5% | 2008 | 34.5% | 2019 | 24.3% |
| 1998 | 36.2% | 2009 | 33% | 2020 | 21.8% |
| 1999 | 36% | 2010 | 32.8% | 2021 | 22.2% |
| 2000 | 35.4% | 2011 | 33.4% | 2022 | 22.2% |
| 2001 | 33.1% | 2012 | 33.9% | 2023 | 23.6% |
| 2002 | 32.4% | 2013 | 33.6% | 2024 | 26.4% |
| 2003 | 33% | 2014 | 33% | 2025 | 23.2% |
| 2004 | 34.1% | 2015 | 26.1% | 2026 | 23.1% |
| 2005 | 34.6% | 2016 | 26.8% | | |
Show data table
| 1980 | 4.93B | 1996 | 23.1B | 2012 | 59.8B |
| 1981 | 6.13B | 1997 | 26B | 2013 | 61.4B |
| 1982 | 7.67B | 1998 | 29.2B | 2014 | 66.3B |
| 1983 | 8.84B | 1999 | 33.4B | 2015 | 71.1B |
| 1984 | 9.83B | 2000 | 38.4B | 2016 | 73.8B |
| 1985 | 12B | 2001 | 40.5B | 2017 | 77B |
| 1986 | 12.4B | 2002 | 44B | 2018 | 83.2B |
| 1987 | 12.7B | 2003 | 48.1B | 2019 | 88.3B |
| 1988 | 13.9B | 2004 | 53.3B | 2020 | 83.3B |
| 1989 | 14.2B | 2005 | 58.9B | 2021 | 99.7B |
| 1990 | 15.5B | 2006 | 67.2B | 2022 | 116B |
| 1991 | 16.6B | 2007 | 70.8B | 2023 | 124B |
| 1992 | 18B | 2008 | 64.7B | 2024 | 149B |
| 1993 | 18.5B | 2009 | 55.9B | 2025 | 147B |
| 1994 | 20.1B | 2010 | 54.9B | 2026 | 153B |
| 1995 | 21B | 2011 | 57.8B | | |
Show data table
| 1995 | 40.3% | 2006 | 33.6% | 2017 | 25.3% |
| 1996 | 38.5% | 2007 | 35.6% | 2018 | 24.7% |
| 1997 | 36.1% | 2008 | 41.6% | 2019 | 23.9% |
| 1998 | 34.2% | 2009 | 46.9% | 2020 | 26.7% |
| 1999 | 32.5% | 2010 | 64.9% | 2021 | 23.5% |
| 2000 | 30.6% | 2011 | 46.9% | 2022 | 20.7% |
| 2001 | 32.2% | 2012 | 42.3% | 2023 | 22.2% |
| 2002 | 32.9% | 2013 | 39.8% | 2024 | 22.4% |
| 2003 | 32.7% | 2014 | 36.6% | 2025 | 21.6% |
| 2004 | 32.8% | 2015 | 28.1% | 2026 | 22.6% |
| 2005 | 33% | 2016 | 27.5% | | |
Show data table
| 1980 | 6.33B | 1996 | 23.2B | 2012 | 74.7B |
| 1981 | 7.93B | 1997 | 25B | 2013 | 72.9B |
| 1982 | 9.95B | 1998 | 27.5B | 2014 | 73.3B |
| 1983 | 11B | 1999 | 30.2B | 2015 | 76.4B |
| 1984 | 11.9B | 2000 | 33.2B | 2016 | 75.9B |
| 1985 | 14.6B | 2001 | 39.3B | 2017 | 78B |
| 1986 | 15.1B | 2002 | 44.7B | 2018 | 82.9B |
| 1987 | 15B | 2003 | 47.6B | 2019 | 86.8B |
| 1988 | 15.2B | 2004 | 51.3B | 2020 | 102B |
| 1989 | 14.9B | 2005 | 56.2B | 2021 | 106B |
| 1990 | 16.4B | 2006 | 62.1B | 2022 | 108B |
| 1991 | 17.7B | 2007 | 70.2B | 2023 | 117B |
| 1992 | 19.1B | 2008 | 77.8B | 2024 | 126B |
| 1993 | 19.6B | 2009 | 79.5B | 2025 | 137B |
| 1994 | 20.9B | 2010 | 109B | 2026 | 149B |
| 1995 | 22.1B | 2011 | 81.1B | | |