Show data table
| 1981 | 33.2% | 1997 | 22.4% | 2013 | 30.9% |
| 1982 | 8.1% | 1998 | 22.3% | 2014 | 32% |
| 1983 | 11% | 1999 | 22.8% | 2015 | 31.2% |
| 1984 | 3.2% | 2000 | 22.9% | 2016 | 26.9% |
| 1985 | 10.7% | 2001 | 22.5% | 2017 | 25.1% |
| 1986 | 17.5% | 2002 | 21.8% | 2018 | 24.6% |
| 1987 | 15% | 2003 | 21.5% | 2019 | 24.1% |
| 1988 | 15.6% | 2004 | 24.1% | 2020 | 21% |
| 1989 | 16.9% | 2005 | 27.6% | 2021 | 21.6% |
| 1990 | 16.4% | 2006 | 30.6% | 2022 | 25% |
| 1991 | 17.9% | 2007 | 27.6% | 2023 | 24% |
| 1992 | 18.7% | 2008 | 34.2% | 2024 | 24.8% |
| 1993 | 18.9% | 2009 | 31.2% | 2025 | 20.6% |
| 1994 | 21.3% | 2010 | 28.9% | 2026 | 19.7% |
| 1995 | 21.4% | 2011 | 31.3% | | |
| 1996 | 21.6% | 2012 | 32.8% | | |
Show data table
| 1981 | 0M | 1997 | 10.4B | 2013 | 76.3B |
| 1982 | 0M | 1998 | 11.6B | 2014 | 86.3B |
| 1983 | 0M | 1999 | 12.3B | 2015 | 85.7B |
| 1984 | 1M | 2000 | 13.3B | 2016 | 76.8B |
| 1985 | 284M | 2001 | 13.5B | 2017 | 79.8B |
| 1986 | 1.49B | 2002 | 13.9B | 2018 | 82.2B |
| 1987 | 1.49B | 2003 | 14.9B | 2019 | 81.7B |
| 1988 | 1.89B | 2004 | 18.7B | 2020 | 61.3B |
| 1989 | 2.4B | 2005 | 23.8B | 2021 | 71.3B |
| 1990 | 2.84B | 2006 | 31.5B | 2022 | 88.1B |
| 1991 | 3.82B | 2007 | 32B | 2023 | 86.9B |
| 1992 | 4.59B | 2008 | 46.9B | 2024 | 94.1B |
| 1993 | 5.16B | 2009 | 43.6B | 2025 | 90.7B |
| 1994 | 6.57B | 2010 | 45.7B | 2026 | 109B |
| 1995 | 7.73B | 2011 | 60.2B | | |
| 1996 | 9.06B | 2012 | 70.7B | | |
Show data table
| 1981 | 41.8% | 1997 | 25.3% | 2013 | 30.4% |
| 1982 | 22.4% | 1998 | 26.8% | 2014 | 34.9% |
| 1983 | 28.7% | 1999 | 26.3% | 2015 | 37% |
| 1984 | 26% | 2000 | 26.2% | 2016 | 32.9% |
| 1985 | 19.5% | 2001 | 28.6% | 2017 | 31.6% |
| 1986 | 19.9% | 2002 | 29.6% | 2018 | 31.4% |
| 1987 | 21.8% | 2003 | 28.6% | 2019 | 30.1% |
| 1988 | 21.5% | 2004 | 29% | 2020 | 31.9% |
| 1989 | 21.8% | 2005 | 29.5% | 2021 | 29.4% |
| 1990 | 20.4% | 2006 | 26.6% | 2022 | 31.2% |
| 1991 | 21.6% | 2007 | 28.9% | 2023 | 33.5% |
| 1992 | 22.6% | 2008 | 31.1% | 2024 | 33.5% |
| 1993 | 24.3% | 2009 | 28.9% | 2025 | 32.2% |
| 1994 | 23.9% | 2010 | 27.5% | 2026 | 29% |
| 1995 | 23.1% | 2011 | 30.6% | | |
| 1996 | 23.3% | 2012 | 31.3% | | |
Show data table
| 1981 | 0M | 1997 | 11.8B | 2013 | 75.1B |
| 1982 | 0M | 1998 | 14B | 2014 | 94B |
| 1983 | 0M | 1999 | 14.1B | 2015 | 102B |
| 1984 | 6M | 2000 | 15.2B | 2016 | 93.8B |
| 1985 | 515M | 2001 | 17.2B | 2017 | 100B |
| 1986 | 1.69B | 2002 | 18.9B | 2018 | 105B |
| 1987 | 2.17B | 2003 | 19.8B | 2019 | 102B |
| 1988 | 2.59B | 2004 | 22.5B | 2020 | 93.4B |
| 1989 | 3.1B | 2005 | 25.6B | 2021 | 97.4B |
| 1990 | 3.52B | 2006 | 27.4B | 2022 | 110B |
| 1991 | 4.63B | 2007 | 33.6B | 2023 | 121B |
| 1992 | 5.56B | 2008 | 42.6B | 2024 | 127B |
| 1993 | 6.65B | 2009 | 40.4B | 2025 | 142B |
| 1994 | 7.4B | 2010 | 43.4B | 2026 | 161B |
| 1995 | 8.31B | 2011 | 58.8B | | |
| 1996 | 9.78B | 2012 | 67.4B | | |