Show data table
| 1980 | 49% | 1996 | 55.8% | 2012 | 54.7% |
| 1981 | 49.2% | 1997 | 55% | 2013 | 54.6% |
| 1982 | 47.9% | 1998 | 55.3% | 2014 | 56.5% |
| 1983 | 50.7% | 1999 | 55.7% | 2015 | 53.5% |
| 1984 | 51.3% | 2000 | 54.7% | 2016 | 52.7% |
| 1985 | 53.1% | 2001 | 54.1% | 2017 | 52.3% |
| 1986 | 53.1% | 2002 | 53.3% | 2018 | 51.6% |
| 1987 | 54.7% | 2003 | 53.6% | 2019 | 54.1% |
| 1988 | 55.1% | 2004 | 55% | 2020 | 53.7% |
| 1989 | 54% | 2005 | 56.3% | 2021 | 53.8% |
| 1990 | 53.3% | 2006 | 55% | 2022 | 48.5% |
| 1991 | 52.3% | 2007 | 54.8% | 2023 | 50.8% |
| 1992 | 53.8% | 2008 | 53.7% | 2024 | 51.8% |
| 1993 | 55.7% | 2009 | 53.6% | 2025 | 50.5% |
| 1994 | 55.6% | 2010 | 54% | 2026 | 49.1% |
| 1995 | 55.2% | 2011 | 54.5% | | |
Show data table
| 1980 | 196B | 1996 | 607B | 2012 | 1.04T |
| 1981 | 216B | 1997 | 629B | 2013 | 1.06T |
| 1982 | 240B | 1998 | 656B | 2014 | 1.12T |
| 1983 | 280B | 1999 | 692B | 2015 | 1.09T |
| 1984 | 312B | 2000 | 725B | 2016 | 1.11T |
| 1985 | 352B | 2001 | 743B | 2017 | 1.14T |
| 1986 | 377B | 2002 | 753B | 2018 | 1.16T |
| 1987 | 408B | 2003 | 772B | 2019 | 1.25T |
| 1988 | 429B | 2004 | 831B | 2020 | 1.25T |
| 1989 | 443B | 2005 | 895B | 2021 | 1.37T |
| 1990 | 456B | 2006 | 927B | 2022 | 1.37T |
| 1991 | 466B | 2007 | 955B | 2023 | 1.42T |
| 1992 | 497B | 2008 | 973B | 2024 | 1.52T |
| 1993 | 517B | 2009 | 927B | 2025 | 1.54T |
| 1994 | 552B | 2010 | 979B | 2026 | 1.56T |
| 1995 | 572B | 2011 | 1.01T | | |
Show data table
| 1980 | 52.7% | 1996 | 58.2% | 2012 | 57.9% |
| 1981 | 56% | 1997 | 56.2% | 2013 | 55.6% |
| 1982 | 57.1% | 1998 | 55.6% | 2014 | 55.1% |
| 1983 | 57.2% | 1999 | 54.7% | 2015 | 54.4% |
| 1984 | 55.7% | 2000 | 52.9% | 2016 | 52.4% |
| 1985 | 54.7% | 2001 | 53% | 2017 | 50.6% |
| 1986 | 51.8% | 2002 | 53.1% | 2018 | 50.8% |
| 1987 | 53.3% | 2003 | 53.5% | 2019 | 49.8% |
| 1988 | 55.2% | 2004 | 52.8% | 2020 | 53.3% |
| 1989 | 55.3% | 2005 | 51.1% | 2021 | 49.7% |
| 1990 | 55.1% | 2006 | 49.7% | 2022 | 45.1% |
| 1991 | 55.5% | 2007 | 49.5% | 2023 | 47.4% |
| 1992 | 56.4% | 2008 | 50.3% | 2024 | 47.3% |
| 1993 | 59.5% | 2009 | 56.3% | 2025 | 47.6% |
| 1994 | 59.5% | 2010 | 56.5% | 2026 | 48.9% |
| 1995 | 58.7% | 2011 | 56.3% | | |
Show data table
| 1980 | 210B | 1996 | 633B | 2012 | 1.1T |
| 1981 | 245B | 1997 | 643B | 2013 | 1.08T |
| 1982 | 286B | 1998 | 659B | 2014 | 1.09T |
| 1983 | 316B | 1999 | 678B | 2015 | 1.1T |
| 1984 | 339B | 2000 | 701B | 2016 | 1.1T |
| 1985 | 362B | 2001 | 727B | 2017 | 1.11T |
| 1986 | 368B | 2002 | 749B | 2018 | 1.14T |
| 1987 | 398B | 2003 | 770B | 2019 | 1.15T |
| 1988 | 430B | 2004 | 797B | 2020 | 1.24T |
| 1989 | 454B | 2005 | 812B | 2021 | 1.27T |
| 1990 | 471B | 2006 | 838B | 2022 | 1.28T |
| 1991 | 494B | 2007 | 862B | 2023 | 1.32T |
| 1992 | 521B | 2008 | 910B | 2024 | 1.39T |
| 1993 | 552B | 2009 | 974B | 2025 | 1.46T |
| 1994 | 590B | 2010 | 1.02T | 2026 | 1.56T |
| 1995 | 608B | 2011 | 1.04T | | |