Show data table
| 1980 | 54.2% | 1996 | 56.9% | 2012 | 49.1% |
| 1981 | 57.7% | 1997 | 56.3% | 2013 | 49.7% |
| 1982 | 57.8% | 1998 | 56.4% | 2014 | 48.9% |
| 1983 | 58.9% | 1999 | 55.8% | 2015 | 49.1% |
| 1984 | 58.3% | 2000 | 55.3% | 2016 | 50.4% |
| 1985 | 58.8% | 2001 | 53.1% | 2017 | 50.5% |
| 1986 | 60.2% | 2002 | 51.2% | 2018 | 50.4% |
| 1987 | 61.6% | 2003 | 51.7% | 2019 | 49.2% |
| 1988 | 60.2% | 2004 | 51.8% | 2020 | 48.8% |
| 1989 | 60.2% | 2005 | 53.3% | 2021 | 49.2% |
| 1990 | 61.2% | 2006 | 52.3% | 2022 | 49.3% |
| 1991 | 61.5% | 2007 | 51.8% | 2023 | 48.3% |
| 1992 | 58% | 2008 | 51.3% | 2024 | 47.8% |
| 1993 | 57.1% | 2009 | 50.8% | 2025 | 48% |
| 1994 | 56.5% | 2010 | 49.6% | 2026 | 47% |
| 1995 | 55.1% | 2011 | 48.7% | | |
Show data table
| 1980 | 321B | 1996 | 1.11T | 2012 | 1.83T |
| 1981 | 374B | 1997 | 1.15T | 2013 | 1.89T |
| 1982 | 410B | 1998 | 1.22T | 2014 | 1.94T |
| 1983 | 468B | 1999 | 1.27T | 2015 | 2.08T |
| 1984 | 521B | 2000 | 1.33T | 2016 | 2.21T |
| 1985 | 572B | 2001 | 1.33T | 2017 | 2.31T |
| 1986 | 641B | 2002 | 1.33T | 2018 | 2.41T |
| 1987 | 710B | 2003 | 1.4T | 2019 | 2.47T |
| 1988 | 759B | 2004 | 1.47T | 2020 | 2.45T |
| 1989 | 840B | 2005 | 1.56T | 2021 | 2.66T |
| 1990 | 940B | 2006 | 1.63T | 2022 | 2.87T |
| 1991 | 1.01T | 2007 | 1.72T | 2023 | 2.97T |
| 1992 | 954B | 2008 | 1.74T | 2024 | 3.06T |
| 1993 | 944B | 2009 | 1.69T | 2025 | 3.15T |
| 1994 | 997B | 2010 | 1.76T | 2026 | 3.22T |
| 1995 | 1.05T | 2011 | 1.8T | | |
Show data table
| 1980 | 59.5% | 1996 | 60% | 2012 | 50.2% |
| 1981 | 62.1% | 1997 | 57.9% | 2013 | 51.4% |
| 1982 | 64% | 1998 | 55.6% | 2014 | 50.7% |
| 1983 | 63.7% | 1999 | 55.2% | 2015 | 49.4% |
| 1984 | 61% | 2000 | 52.2% | 2016 | 49.5% |
| 1985 | 62.1% | 2001 | 51.7% | 2017 | 49.2% |
| 1986 | 60.2% | 2002 | 52.7% | 2018 | 49.8% |
| 1987 | 58% | 2003 | 53% | 2019 | 48.8% |
| 1988 | 56.6% | 2004 | 51.7% | 2020 | 52% |
| 1989 | 56.6% | 2005 | 51.2% | 2021 | 49.3% |
| 1990 | 57.5% | 2006 | 50.1% | 2022 | 48.3% |
| 1991 | 61.2% | 2007 | 48.5% | 2023 | 48.9% |
| 1992 | 66.5% | 2008 | 49.4% | 2024 | 49.3% |
| 1993 | 67.9% | 2009 | 51.7% | 2025 | 49.4% |
| 1994 | 65.3% | 2010 | 49.7% | 2026 | 49.4% |
| 1995 | 62.1% | 2011 | 49.1% | | |
Show data table
| 1980 | 353B | 1996 | 1.18T | 2012 | 1.87T |
| 1981 | 402B | 1997 | 1.19T | 2013 | 1.95T |
| 1982 | 454B | 1998 | 1.2T | 2014 | 2.01T |
| 1983 | 506B | 1999 | 1.25T | 2015 | 2.09T |
| 1984 | 545B | 2000 | 1.26T | 2016 | 2.18T |
| 1985 | 604B | 2001 | 1.3T | 2017 | 2.25T |
| 1986 | 641B | 2002 | 1.37T | 2018 | 2.38T |
| 1987 | 668B | 2003 | 1.43T | 2019 | 2.45T |
| 1988 | 713B | 2004 | 1.46T | 2020 | 2.61T |
| 1989 | 791B | 2005 | 1.5T | 2021 | 2.67T |
| 1990 | 883B | 2006 | 1.56T | 2022 | 2.81T |
| 1991 | 1.01T | 2007 | 1.61T | 2023 | 3T |
| 1992 | 1.09T | 2008 | 1.68T | 2024 | 3.15T |
| 1993 | 1.12T | 2009 | 1.72T | 2025 | 3.25T |
| 1994 | 1.15T | 2010 | 1.77T | 2026 | 3.39T |
| 1995 | 1.18T | 2011 | 1.82T | | |