表を表示
| 1999 | 46% | 2009 | 38.3% | 2019 | 28.3% |
| 2000 | 47.5% | 2010 | 34.6% | 2020 | 25.7% |
| 2001 | 39.2% | 2011 | 37% | 2021 | 29.1% |
| 2002 | 41.1% | 2012 | 38% | 2022 | 29.1% |
| 2003 | 42.6% | 2013 | 39.3% | 2023 | 28.2% |
| 2004 | 41.2% | 2014 | 40.4% | 2024 | 26.5% |
| 2005 | 44.1% | 2015 | 33% | 2025 | 27.6% |
| 2006 | 46.4% | 2016 | 34.8% | 2026 | 25% |
| 2007 | 42.8% | 2017 | 33.5% | | |
| 2008 | 40.5% | 2018 | 30.6% | | |
表を表示
| 1999 | 120億 | 2009 | 290億 | 2019 | 503億 |
| 2000 | 141億 | 2010 | 312億 | 2020 | 463億 |
| 2001 | 127億 | 2011 | 385億 | 2021 | 636億 |
| 2002 | 143億 | 2012 | 417億 | 2022 | 741億 |
| 2003 | 162億 | 2013 | 490億 | 2023 | 743億 |
| 2004 | 180億 | 2014 | 560億 | 2024 | 695億 |
| 2005 | 230億 | 2015 | 475億 | 2025 | 742億 |
| 2006 | 277億 | 2016 | 575億 | 2026 | 728億 |
| 2007 | 287億 | 2017 | 565億 | | |
| 2008 | 296億 | 2018 | 535億 | | |
表を表示
| 1980 | 34.3% | 1996 | 36.1% | 2012 | 37.1% |
| 1981 | 37.3% | 1997 | 39% | 2013 | 33.5% |
| 1982 | 36.7% | 1998 | 41.8% | 2014 | 36.5% |
| 1983 | 34.4% | 1999 | 40.1% | 2015 | 37.8% |
| 1984 | 34.6% | 2000 | 38.8% | 2016 | 34.1% |
| 1985 | 31.4% | 2001 | 42.1% | 2017 | 34.7% |
| 1986 | 35.5% | 2002 | 45.1% | 2018 | 35.6% |
| 1987 | 35.9% | 2003 | 42.7% | 2019 | 36.9% |
| 1988 | 32.1% | 2004 | 39.8% | 2020 | 36.5% |
| 1989 | 34% | 2005 | 33.8% | 2021 | 31.4% |
| 1990 | 38.9% | 2006 | 33.1% | 2022 | 29.1% |
| 1991 | 41.1% | 2007 | 37.1% | 2023 | 32.4% |
| 1992 | 42.3% | 2008 | 48.1% | 2024 | 33.7% |
| 1993 | 42% | 2009 | 52.1% | 2025 | 35% |
| 1994 | 37.6% | 2010 | 42.6% | 2026 | 35.7% |
| 1995 | 36.1% | 2011 | 37.2% | | |
表を表示
| 1980 | 2.93億 | 1996 | 60.5億 | 2012 | 407億 |
| 1981 | 3.39億 | 1997 | 73.2億 | 2013 | 417億 |
| 1982 | 4.08億 | 1998 | 89.4億 | 2014 | 506億 |
| 1983 | 4.64億 | 1999 | 104億 | 2015 | 544億 |
| 1984 | 5.96億 | 2000 | 115億 | 2016 | 563億 |
| 1985 | 7.16億 | 2001 | 137億 | 2017 | 584億 |
| 1986 | 9.67億 | 2002 | 157億 | 2018 | 624億 |
| 1987 | 12.8億 | 2003 | 163億 | 2019 | 654億 |
| 1988 | 17.2億 | 2004 | 174億 | 2020 | 659億 |
| 1989 | 21.8億 | 2005 | 176億 | 2021 | 687億 |
| 1990 | 28.6億 | 2006 | 197億 | 2022 | 740億 |
| 1991 | 33.7億 | 2007 | 248億 | 2023 | 853億 |
| 1992 | 37.9億 | 2008 | 352億 | 2024 | 886億 |
| 1993 | 44.5億 | 2009 | 395億 | 2025 | 942億 |
| 1994 | 44.7億 | 2010 | 384億 | 2026 | 1,039億 |
| 1995 | 50.8億 | 2011 | 387億 | | |