表を表示
| 1988 | 24% | 2001 | 27.3% | 2014 | 21.8% |
| 1989 | 31.6% | 2002 | 29.5% | 2015 | 14.9% |
| 1990 | 35.8% | 2003 | 32.3% | 2016 | 11.2% |
| 1991 | 31.6% | 2004 | 34.4% | 2017 | 8.5% |
| 1992 | 24.3% | 2005 | 37.6% | 2018 | 6.9% |
| 1993 | 24.7% | 2006 | 37.7% | 2019 | 10.1% |
| 1994 | 31% | 2007 | 33.1% | 2020 | 4.5% |
| 1995 | 27% | 2008 | 31.4% | 2021 | 7.3% |
| 1996 | 35.7% | 2009 | 24.6% | 2022 | 9.8% |
| 1997 | 33.6% | 2010 | 26.4% | 2023 | 11.9% |
| 1998 | 24.3% | 2011 | 31.1% | 2024 | 13.8% |
| 1999 | 26.8% | 2012 | 28.2% | 2025 | 14.5% |
| 2000 | 32.7% | 2013 | 26.1% | | |
表を表示
| 2018 | 0万 | 2021 | 135億 | 2024 | 6,873億 |
| 2019 | 1.01億 | 2022 | 612億 | 2025 | 2.38兆 |
| 2020 | 6.35億 | 2023 | 3,592億 | | |
表を表示
| 1988 | 33.2% | 2001 | 31.9% | 2014 | 31.6% |
| 1989 | 32.5% | 2002 | 31% | 2015 | 22.9% |
| 1990 | 31.9% | 2003 | 32.2% | 2016 | 19.7% |
| 1991 | 33.9% | 2004 | 31.9% | 2017 | 21.8% |
| 1992 | 30.6% | 2005 | 33.5% | 2018 | 37.9% |
| 1993 | 27.7% | 2006 | 39.3% | 2019 | 21% |
| 1994 | 42.2% | 2007 | 35.9% | 2020 | 11.2% |
| 1995 | 32.9% | 2008 | 34.9% | 2021 | 13.1% |
| 1996 | 27.7% | 2009 | 33.3% | 2022 | 15.1% |
| 1997 | 31% | 2010 | 31.1% | 2023 | 13.1% |
| 1998 | 28.8% | 2011 | 39.4% | 2024 | 17.5% |
| 1999 | 26.1% | 2012 | 38% | 2025 | 20.3% |
| 2000 | 28.3% | 2013 | 36.5% | | |
表を表示
| 2017 | 0万 | 2020 | 15.6億 | 2023 | 3,970億 |
| 2018 | 200万 | 2021 | 243億 | 2024 | 8,694億 |
| 2019 | 2.11億 | 2022 | 941億 | 2025 | 3.35兆 |