Show data table
| 1980 | 43.6% | 1996 | 71.2% | 2012 | 65.7% |
| 1981 | 46.9% | 1997 | 65.7% | 2013 | 67.2% |
| 1982 | 52.4% | 1998 | 62.7% | 2014 | 67.2% |
| 1983 | 58.4% | 1999 | 58.6% | 2015 | 63.8% |
| 1984 | 61.9% | 2000 | 52.2% | 2016 | 60.9% |
| 1985 | 67.1% | 2001 | 49.4% | 2017 | 56% |
| 1986 | 68.9% | 2002 | 48.7% | 2018 | 51.6% |
| 1987 | 71.3% | 2003 | 49.8% | 2019 | 47.7% |
| 1988 | 73.7% | 2004 | 50.1% | 2020 | 53.4% |
| 1989 | 73.7% | 2005 | 49.6% | 2021 | 50.5% |
| 1990 | 75% | 2006 | 45% | 2022 | 48.4% |
| 1991 | 74.8% | 2007 | 42.7% | 2023 | 45.9% |
| 1992 | 75.6% | 2008 | 54.4% | 2024 | 43.7% |
| 1993 | 76.7% | 2009 | 56.3% | 2025 | 43.3% |
| 1994 | 73.5% | 2010 | 58.9% | 2026 | 44.1% |
| 1995 | 73% | 2011 | 61.2% | | |
Show data table
| 1980 | 76.1B | 1996 | 246B | 2012 | 432B |
| 1981 | 85.9B | 1997 | 243B | 2013 | 447B |
| 1982 | 100B | 1998 | 247B | 2014 | 456B |
| 1983 | 116B | 1999 | 246B | 2015 | 446B |
| 1984 | 128B | 2000 | 236B | 2016 | 438B |
| 1985 | 145B | 2001 | 239B | 2017 | 420B |
| 1986 | 154B | 2002 | 245B | 2018 | 406B |
| 1987 | 162B | 2003 | 256B | 2019 | 395B |
| 1988 | 175B | 2004 | 266B | 2020 | 436B |
| 1989 | 185B | 2005 | 274B | 2021 | 450B |
| 1990 | 199B | 2006 | 264B | 2022 | 481B |
| 1991 | 210B | 2007 | 266B | 2023 | 481B |
| 1992 | 221B | 2008 | 354B | 2024 | 491B |
| 1993 | 230B | 2009 | 355B | 2025 | 511B |
| 1994 | 232B | 2010 | 379B | 2026 | 543B |
| 1995 | 241B | 2011 | 401B | | |
Show data table
| 1995 | 55.8% | 2006 | 37.2% | 2017 | 46.1% |
| 1996 | 54.9% | 2007 | 34.4% | 2018 | 42.5% |
| 1997 | 51.7% | 2008 | 39.8% | 2019 | 39.3% |
| 1998 | 49% | 2009 | 42.3% | 2020 | 44% |
| 1999 | 45.8% | 2010 | 46.1% | 2021 | 41.6% |
| 2000 | 40.3% | 2011 | 48.7% | 2022 | 39.9% |
| 2001 | 38.9% | 2012 | 52.3% | 2023 | 37.8% |
| 2002 | 39.1% | 2013 | 54% | 2024 | 36% |
| 2003 | 40.8% | 2014 | 54.9% | 2025 | 35.7% |
| 2004 | 41.5% | 2015 | 53% | 2026 | 36.4% |
| 2005 | 39.9% | 2016 | 51% | | |
Show data table
| 1995 | 184B | 2006 | 219B | 2017 | 346B |
| 1996 | 189B | 2007 | 214B | 2018 | 334B |
| 1997 | 191B | 2008 | 259B | 2019 | 326B |
| 1998 | 193B | 2009 | 267B | 2020 | 359B |
| 1999 | 192B | 2010 | 297B | 2021 | 371B |
| 2000 | 182B | 2011 | 319B | 2022 | 396B |
| 2001 | 188B | 2012 | 344B | 2023 | 397B |
| 2002 | 197B | 2013 | 359B | 2024 | 405B |
| 2003 | 210B | 2014 | 373B | 2025 | 421B |
| 2004 | 221B | 2015 | 370B | 2026 | 447B |
| 2005 | 221B | 2016 | 368B | | |