表を表示
| 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% | | |
表を表示
| 1980 | 761億 | 1996 | 2,460億 | 2012 | 4,324億 |
| 1981 | 859億 | 1997 | 2,429億 | 2013 | 4,470億 |
| 1982 | 1,000億 | 1998 | 2,475億 | 2014 | 4,558億 |
| 1983 | 1,157億 | 1999 | 2,462億 | 2015 | 4,461億 |
| 1984 | 1,283億 | 2000 | 2,358億 | 2016 | 4,385億 |
| 1985 | 1,453億 | 2001 | 2,386億 | 2017 | 4,204億 |
| 1986 | 1,541億 | 2002 | 2,449億 | 2018 | 4,059億 |
| 1987 | 1,618億 | 2003 | 2,564億 | 2019 | 3,954億 |
| 1988 | 1,745億 | 2004 | 2,663億 | 2020 | 4,361億 |
| 1989 | 1,849億 | 2005 | 2,742億 | 2021 | 4,502億 |
| 1990 | 1,990億 | 2006 | 2,641億 | 2022 | 4,811億 |
| 1991 | 2,097億 | 2007 | 2,662億 | 2023 | 4,815億 |
| 1992 | 2,206億 | 2008 | 3,540億 | 2024 | 4,911億 |
| 1993 | 2,302億 | 2009 | 3,547億 | 2025 | 5,114億 |
| 1994 | 2,320億 | 2010 | 3,787億 | 2026 | 5,426億 |
| 1995 | 2,410億 | 2011 | 4,013億 | | |
表を表示
| 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% | | |
表を表示
| 1995 | 1,842億 | 2006 | 2,187億 | 2017 | 3,464億 |
| 1996 | 1,895億 | 2007 | 2,144億 | 2018 | 3,344億 |
| 1997 | 1,910億 | 2008 | 2,590億 | 2019 | 3,258億 |
| 1998 | 1,933億 | 2009 | 2,666億 | 2020 | 3,593億 |
| 1999 | 1,924億 | 2010 | 2,967億 | 2021 | 3,710億 |
| 2000 | 1,821億 | 2011 | 3,194億 | 2022 | 3,965億 |
| 2001 | 1,878億 | 2012 | 3,443億 | 2023 | 3,967億 |
| 2002 | 1,965億 | 2013 | 3,591億 | 2024 | 4,046億 |
| 2003 | 2,099億 | 2014 | 3,729億 | 2025 | 4,214億 |
| 2004 | 2,206億 | 2015 | 3,703億 | 2026 | 4,471億 |
| 2005 | 2,205億 | 2016 | 3,675億 | | |