Show data table
| 1980 | 36.9% | 1996 | 42.8% | 2012 | 38.4% |
| 1981 | 38.9% | 1997 | 43.5% | 2013 | 38.5% |
| 1982 | 39.5% | 1998 | 43.5% | 2014 | 38.5% |
| 1983 | 39% | 1999 | 43.4% | 2015 | 40% |
| 1984 | 38.8% | 2000 | 43.2% | 2016 | 40.3% |
| 1985 | 38.7% | 2001 | 41.6% | 2017 | 40.3% |
| 1986 | 39.5% | 2002 | 40.2% | 2018 | 41% |
| 1987 | 39.7% | 2003 | 40.1% | 2019 | 40.6% |
| 1988 | 40.3% | 2004 | 39.9% | 2020 | 41.4% |
| 1989 | 40.5% | 2005 | 40.1% | 2021 | 42.4% |
| 1990 | 42.2% | 2006 | 40.5% | 2022 | 41% |
| 1991 | 43.1% | 2007 | 40.3% | 2023 | 41.6% |
| 1992 | 43.3% | 2008 | 39% | 2024 | 42.2% |
| 1993 | 42.5% | 2009 | 39.5% | 2025 | 42.2% |
| 1994 | 42.1% | 2010 | 38.3% | 2026 | 41.9% |
| 1995 | 42.2% | 2011 | 38.3% | | |
Show data table
| 1980 | 119B | 1996 | 368B | 2012 | 702B |
| 1981 | 143B | 1997 | 395B | 2013 | 732B |
| 1982 | 153B | 1998 | 410B | 2014 | 769B |
| 1983 | 164B | 1999 | 438B | 2015 | 795B |
| 1984 | 179B | 2000 | 478B | 2016 | 816B |
| 1985 | 194B | 2001 | 476B | 2017 | 864B |
| 1986 | 208B | 2002 | 479B | 2018 | 917B |
| 1987 | 228B | 2003 | 504B | 2019 | 939B |
| 1988 | 252B | 2004 | 533B | 2020 | 920B |
| 1989 | 272B | 2005 | 570B | 2021 | 1.08T |
| 1990 | 293B | 2006 | 606B | 2022 | 1.18T |
| 1991 | 302B | 2007 | 636B | 2023 | 1.23T |
| 1992 | 311B | 2008 | 646B | 2024 | 1.31T |
| 1993 | 318B | 2009 | 621B | 2025 | 1.37T |
| 1994 | 333B | 2010 | 639B | 2026 | 1.43T |
| 1995 | 351B | 2011 | 679B | | |
Show data table
| 1980 | 40.9% | 1996 | 45.9% | 2012 | 40.9% |
| 1981 | 41.8% | 1997 | 43.5% | 2013 | 40% |
| 1982 | 46.4% | 1998 | 43.4% | 2014 | 38.4% |
| 1983 | 47% | 1999 | 41.8% | 2015 | 40% |
| 1984 | 46.8% | 2000 | 40.6% | 2016 | 40.8% |
| 1985 | 47.5% | 2001 | 41.1% | 2017 | 40.5% |
| 1986 | 46.8% | 2002 | 40.4% | 2018 | 40.7% |
| 1987 | 45.4% | 2003 | 40.3% | 2019 | 40.6% |
| 1988 | 44.8% | 2004 | 39.1% | 2020 | 52.4% |
| 1989 | 45.3% | 2005 | 38.5% | 2021 | 45.5% |
| 1990 | 48.1% | 2006 | 38.7% | 2022 | 40.4% |
| 1991 | 51.4% | 2007 | 38.5% | 2023 | 41.8% |
| 1992 | 52.5% | 2008 | 38.8% | 2024 | 44.3% |
| 1993 | 51.5% | 2009 | 43.4% | 2025 | 44% |
| 1994 | 49% | 2010 | 43.1% | 2026 | 44.6% |
| 1995 | 47.7% | 2011 | 41.6% | | |
Show data table
| 1980 | 132B | 1996 | 394B | 2012 | 748B |
| 1981 | 154B | 1997 | 394B | 2013 | 760B |
| 1982 | 180B | 1998 | 408B | 2014 | 765B |
| 1983 | 198B | 1999 | 421B | 2015 | 797B |
| 1984 | 216B | 2000 | 449B | 2016 | 825B |
| 1985 | 237B | 2001 | 470B | 2017 | 866B |
| 1986 | 247B | 2002 | 482B | 2018 | 909B |
| 1987 | 261B | 2003 | 505B | 2019 | 939B |
| 1988 | 281B | 2004 | 523B | 2020 | 1.16T |
| 1989 | 304B | 2005 | 548B | 2021 | 1.15T |
| 1990 | 334B | 2006 | 579B | 2022 | 1.16T |
| 1991 | 361B | 2007 | 608B | 2023 | 1.24T |
| 1992 | 377B | 2008 | 643B | 2024 | 1.38T |
| 1993 | 385B | 2009 | 682B | 2025 | 1.43T |
| 1994 | 388B | 2010 | 717B | 2026 | 1.52T |
| 1995 | 397B | 2011 | 738B | | |