表を表示
| 1981 | 33.2% | 1997 | 22.4% | 2013 | 30.9% |
| 1982 | 8.1% | 1998 | 22.3% | 2014 | 32% |
| 1983 | 11% | 1999 | 22.8% | 2015 | 31.2% |
| 1984 | 3.2% | 2000 | 22.9% | 2016 | 26.9% |
| 1985 | 10.7% | 2001 | 22.5% | 2017 | 25.1% |
| 1986 | 17.5% | 2002 | 21.8% | 2018 | 24.6% |
| 1987 | 15% | 2003 | 21.5% | 2019 | 24.1% |
| 1988 | 15.6% | 2004 | 24.1% | 2020 | 21% |
| 1989 | 16.9% | 2005 | 27.6% | 2021 | 21.6% |
| 1990 | 16.4% | 2006 | 30.6% | 2022 | 25% |
| 1991 | 17.9% | 2007 | 27.6% | 2023 | 24% |
| 1992 | 18.7% | 2008 | 34.2% | 2024 | 24.8% |
| 1993 | 18.9% | 2009 | 31.2% | 2025 | 20.6% |
| 1994 | 21.3% | 2010 | 28.9% | 2026 | 19.7% |
| 1995 | 21.4% | 2011 | 31.3% | | |
| 1996 | 21.6% | 2012 | 32.8% | | |
表を表示
| 1981 | 0万 | 1997 | 104億 | 2013 | 763億 |
| 1982 | 0万 | 1998 | 116億 | 2014 | 863億 |
| 1983 | 0万 | 1999 | 123億 | 2015 | 857億 |
| 1984 | 100万 | 2000 | 133億 | 2016 | 768億 |
| 1985 | 2.84億 | 2001 | 135億 | 2017 | 798億 |
| 1986 | 14.9億 | 2002 | 139億 | 2018 | 822億 |
| 1987 | 14.8億 | 2003 | 149億 | 2019 | 817億 |
| 1988 | 18.9億 | 2004 | 187億 | 2020 | 613億 |
| 1989 | 24億 | 2005 | 238億 | 2021 | 713億 |
| 1990 | 28.4億 | 2006 | 315億 | 2022 | 881億 |
| 1991 | 38.2億 | 2007 | 320億 | 2023 | 869億 |
| 1992 | 45.9億 | 2008 | 469億 | 2024 | 941億 |
| 1993 | 51.6億 | 2009 | 436億 | 2025 | 907億 |
| 1994 | 65.7億 | 2010 | 457億 | 2026 | 1,091億 |
| 1995 | 77.2億 | 2011 | 602億 | | |
| 1996 | 90.6億 | 2012 | 707億 | | |
表を表示
| 1981 | 41.8% | 1997 | 25.3% | 2013 | 30.4% |
| 1982 | 22.4% | 1998 | 26.8% | 2014 | 34.9% |
| 1983 | 28.7% | 1999 | 26.3% | 2015 | 37% |
| 1984 | 26% | 2000 | 26.2% | 2016 | 32.9% |
| 1985 | 19.5% | 2001 | 28.6% | 2017 | 31.6% |
| 1986 | 19.9% | 2002 | 29.6% | 2018 | 31.4% |
| 1987 | 21.8% | 2003 | 28.6% | 2019 | 30.1% |
| 1988 | 21.5% | 2004 | 29% | 2020 | 31.9% |
| 1989 | 21.8% | 2005 | 29.5% | 2021 | 29.4% |
| 1990 | 20.4% | 2006 | 26.6% | 2022 | 31.2% |
| 1991 | 21.6% | 2007 | 28.9% | 2023 | 33.5% |
| 1992 | 22.6% | 2008 | 31.1% | 2024 | 33.5% |
| 1993 | 24.3% | 2009 | 28.9% | 2025 | 32.2% |
| 1994 | 23.9% | 2010 | 27.5% | 2026 | 29% |
| 1995 | 23.1% | 2011 | 30.6% | | |
| 1996 | 23.3% | 2012 | 31.3% | | |
表を表示
| 1981 | 0万 | 1997 | 118億 | 2013 | 751億 |
| 1982 | 0万 | 1998 | 140億 | 2014 | 940億 |
| 1983 | 0万 | 1999 | 141億 | 2015 | 1,015億 |
| 1984 | 600万 | 2000 | 152億 | 2016 | 938億 |
| 1985 | 5.15億 | 2001 | 172億 | 2017 | 1,001億 |
| 1986 | 16.9億 | 2002 | 189億 | 2018 | 1,050億 |
| 1987 | 21.7億 | 2003 | 198億 | 2019 | 1,021億 |
| 1988 | 25.9億 | 2004 | 225億 | 2020 | 934億 |
| 1989 | 31億 | 2005 | 256億 | 2021 | 974億 |
| 1990 | 35.2億 | 2006 | 274億 | 2022 | 1,098億 |
| 1991 | 46.3億 | 2007 | 336億 | 2023 | 1,211億 |
| 1992 | 55.6億 | 2008 | 426億 | 2024 | 1,271億 |
| 1993 | 66.5億 | 2009 | 404億 | 2025 | 1,418億 |
| 1994 | 74億 | 2010 | 434億 | 2026 | 1,606億 |
| 1995 | 83.1億 | 2011 | 588億 | | |
| 1996 | 97.8億 | 2012 | 674億 | | |