Show data table
| 1980 | 46.7% | 1996 | 55.1% | 2012 | 53.5% |
| 1981 | 49.3% | 1997 | 53.6% | 2013 | 54.6% |
| 1982 | 48.8% | 1998 | 52.9% | 2014 | 54.6% |
| 1983 | 48.6% | 1999 | 51.5% | 2015 | 53.3% |
| 1984 | 50.2% | 2000 | 53.7% | 2016 | 53.4% |
| 1985 | 52% | 2001 | 51.1% | 2017 | 52.2% |
| 1986 | 53.4% | 2002 | 51.4% | 2018 | 51.8% |
| 1987 | 51.7% | 2003 | 50.6% | 2019 | 51.7% |
| 1988 | 54.4% | 2004 | 50.3% | 2020 | 50.9% |
| 1989 | 53.9% | 2005 | 51.8% | 2021 | 52.5% |
| 1990 | 53.7% | 2006 | 52.2% | 2022 | 52.5% |
| 1991 | 56.1% | 2007 | 51.8% | 2023 | 53.1% |
| 1992 | 55.9% | 2008 | 52.1% | 2024 | 53.4% |
| 1993 | 55.6% | 2009 | 51.6% | 2025 | 53.7% |
| 1994 | 55.8% | 2010 | 51.4% | 2026 | 53.9% |
| 1995 | 54.1% | 2011 | 52.8% | | |
Show data table
| 1980 | 15.7B | 1996 | 56.2B | 2012 | 107B |
| 1981 | 18.8B | 1997 | 59.4B | 2013 | 111B |
| 1982 | 20.9B | 1998 | 63.7B | 2014 | 112B |
| 1983 | 23.2B | 1999 | 65.4B | 2015 | 112B |
| 1984 | 26.8B | 2000 | 73.2B | 2016 | 115B |
| 1985 | 30.3B | 2001 | 73.9B | 2017 | 117B |
| 1986 | 33.5B | 2002 | 76.3B | 2018 | 120B |
| 1987 | 35B | 2003 | 76.8B | 2019 | 123B |
| 1988 | 41.8B | 2004 | 79.9B | 2020 | 120B |
| 1989 | 46.3B | 2005 | 85.3B | 2021 | 131B |
| 1990 | 48.9B | 2006 | 90.2B | 2022 | 140B |
| 1991 | 48.7B | 2007 | 96.9B | 2023 | 145B |
| 1992 | 47.4B | 2008 | 101B | 2024 | 147B |
| 1993 | 47.6B | 2009 | 93.8B | 2025 | 151B |
| 1994 | 50.6B | 2010 | 96.8B | 2026 | 154B |
| 1995 | 53.2B | 2011 | 104B | | |
Show data table
| 1980 | 43.9% | 1996 | 58.5% | 2012 | 55.7% |
| 1981 | 44.5% | 1997 | 54.9% | 2013 | 57.1% |
| 1982 | 46.4% | 1998 | 51.3% | 2014 | 57.6% |
| 1983 | 48.2% | 1999 | 49.9% | 2015 | 55.7% |
| 1984 | 47.5% | 2000 | 46.9% | 2016 | 55.1% |
| 1985 | 49.4% | 2001 | 46.2% | 2017 | 52.9% |
| 1986 | 50% | 2002 | 47.5% | 2018 | 52.7% |
| 1987 | 51% | 2003 | 48.3% | 2019 | 52.6% |
| 1988 | 49.5% | 2004 | 48.2% | 2020 | 56.5% |
| 1989 | 46.8% | 2005 | 49.2% | 2021 | 55.2% |
| 1990 | 47.1% | 2006 | 48.3% | 2022 | 52.6% |
| 1991 | 55.8% | 2007 | 46.7% | 2023 | 56% |
| 1992 | 60.8% | 2008 | 47.9% | 2024 | 57.8% |
| 1993 | 63.7% | 2009 | 54.1% | 2025 | 57.6% |
| 1994 | 62.2% | 2010 | 54% | 2026 | 58.7% |
| 1995 | 60% | 2011 | 53.8% | | |
Show data table
| 1980 | 14.8B | 1996 | 59.6B | 2012 | 112B |
| 1981 | 17B | 1997 | 60.8B | 2013 | 116B |
| 1982 | 19.9B | 1998 | 61.8B | 2014 | 119B |
| 1983 | 23B | 1999 | 63.3B | 2015 | 117B |
| 1984 | 25.4B | 2000 | 64B | 2016 | 119B |
| 1985 | 28.8B | 2001 | 66.9B | 2017 | 119B |
| 1986 | 31.4B | 2002 | 70.4B | 2018 | 122B |
| 1987 | 34.5B | 2003 | 73.3B | 2019 | 125B |
| 1988 | 38B | 2004 | 76.5B | 2020 | 133B |
| 1989 | 40.2B | 2005 | 81B | 2021 | 137B |
| 1990 | 42.8B | 2006 | 83.4B | 2022 | 140B |
| 1991 | 48.5B | 2007 | 87.3B | 2023 | 153B |
| 1992 | 51.6B | 2008 | 93B | 2024 | 159B |
| 1993 | 54.5B | 2009 | 98.3B | 2025 | 162B |
| 1994 | 56.4B | 2010 | 102B | 2026 | 168B |
| 1995 | 59.1B | 2011 | 106B | | |