Show data table
| 1980 | 47.6% | 1996 | 52.1% | 2012 | 52.7% |
| 1981 | 48.2% | 1997 | 51.9% | 2013 | 53.7% |
| 1982 | 49.2% | 1998 | 51.6% | 2014 | 53.8% |
| 1983 | 50% | 1999 | 52.1% | 2015 | 53.7% |
| 1984 | 50.8% | 2000 | 51.3% | 2016 | 53.6% |
| 1985 | 51.2% | 2001 | 51.4% | 2017 | 54.3% |
| 1986 | 50.2% | 2002 | 50.7% | 2018 | 54% |
| 1987 | 50.8% | 2003 | 50.3% | 2019 | 53% |
| 1988 | 49.4% | 2004 | 50.4% | 2020 | 52.8% |
| 1989 | 49.1% | 2005 | 50.8% | 2021 | 52.9% |
| 1990 | 49.2% | 2006 | 51.1% | 2022 | 53.7% |
| 1991 | 49.8% | 2007 | 50.6% | 2023 | 51.4% |
| 1992 | 49.4% | 2008 | 50.8% | 2024 | 51.5% |
| 1993 | 50.1% | 2009 | 50.6% | 2025 | 52.4% |
| 1994 | 50.4% | 2010 | 50.6% | 2026 | 52.4% |
| 1995 | 50.9% | 2011 | 51.7% | | |
Show data table
| 1980 | 213B | 1996 | 650B | 2012 | 1.1T |
| 1981 | 243B | 1997 | 669B | 2013 | 1.14T |
| 1982 | 285B | 1998 | 695B | 2014 | 1.16T |
| 1983 | 322B | 1999 | 727B | 2015 | 1.18T |
| 1984 | 355B | 2000 | 756B | 2016 | 1.2T |
| 1985 | 384B | 2001 | 787B | 2017 | 1.24T |
| 1986 | 405B | 2002 | 801B | 2018 | 1.27T |
| 1987 | 431B | 2003 | 815B | 2019 | 1.29T |
| 1988 | 454B | 2004 | 856B | 2020 | 1.22T |
| 1989 | 485B | 2005 | 894B | 2021 | 1.33T |
| 1990 | 513B | 2006 | 943B | 2022 | 1.42T |
| 1991 | 540B | 2007 | 981B | 2023 | 1.45T |
| 1992 | 554B | 2008 | 1.01T | 2024 | 1.5T |
| 1993 | 569B | 2009 | 980B | 2025 | 1.56T |
| 1994 | 591B | 2010 | 1.01T | 2026 | 1.6T |
| 1995 | 618B | 2011 | 1.07T | | |
Show data table
| 1980 | 46.9% | 1996 | 56% | 2012 | 57.9% |
| 1981 | 49.5% | 1997 | 55.6% | 2013 | 58.6% |
| 1982 | 50.8% | 1998 | 54% | 2014 | 58.4% |
| 1983 | 52.6% | 1999 | 53.7% | 2015 | 57.6% |
| 1984 | 53.6% | 2000 | 52.6% | 2016 | 57.4% |
| 1985 | 54.2% | 2001 | 52.8% | 2017 | 57.7% |
| 1986 | 53.4% | 2002 | 53.9% | 2018 | 56.4% |
| 1987 | 52.8% | 2003 | 54.4% | 2019 | 55.3% |
| 1988 | 52% | 2004 | 54% | 2020 | 61.7% |
| 1989 | 50.9% | 2005 | 54.3% | 2021 | 59.5% |
| 1990 | 51.6% | 2006 | 53.7% | 2022 | 58.4% |
| 1991 | 52.7% | 2007 | 53.6% | 2023 | 56.8% |
| 1992 | 54% | 2008 | 54.3% | 2024 | 57.3% |
| 1993 | 56.5% | 2009 | 58% | 2025 | 57.5% |
| 1994 | 55.9% | 2010 | 57.7% | 2026 | 57.4% |
| 1995 | 56% | 2011 | 57% | | |
Show data table
| 1980 | 210B | 1996 | 698B | 2012 | 1.21T |
| 1981 | 250B | 1997 | 717B | 2013 | 1.24T |
| 1982 | 294B | 1998 | 727B | 2014 | 1.26T |
| 1983 | 338B | 1999 | 749B | 2015 | 1.27T |
| 1984 | 375B | 2000 | 775B | 2016 | 1.28T |
| 1985 | 406B | 2001 | 808B | 2017 | 1.32T |
| 1986 | 431B | 2002 | 851B | 2018 | 1.33T |
| 1987 | 448B | 2003 | 882B | 2019 | 1.35T |
| 1988 | 478B | 2004 | 916B | 2020 | 1.43T |
| 1989 | 503B | 2005 | 956B | 2021 | 1.49T |
| 1990 | 539B | 2006 | 992B | 2022 | 1.55T |
| 1991 | 571B | 2007 | 1.04T | 2023 | 1.61T |
| 1992 | 606B | 2008 | 1.08T | 2024 | 1.67T |
| 1993 | 642B | 2009 | 1.12T | 2025 | 1.71T |
| 1994 | 656B | 2010 | 1.15T | 2026 | 1.75T |
| 1995 | 680B | 2011 | 1.18T | | |