表を表示
| 1980 | 101億 | 1996 | 43.5億 | 2012 | 731億 |
| 1981 | 108億 | 1997 | 86.9億 | 2013 | 732億 |
| 1982 | 70億 | 1998 | 29.7億 | 2014 | 545億 |
| 1983 | 52.6億 | 1999 | 54.4億 | 2015 | 176億 |
| 1984 | 74.6億 | 2000 | 168億 | 2016 | 132億 |
| 1985 | 69.1億 | 2001 | 93.7億 | 2017 | 275億 |
| 1986 | 23.8億 | 2002 | 36.4億 | 2018 | 412億 |
| 1987 | 37.2億 | 2003 | 71.9億 | 2019 | 373億 |
| 1988 | 25.3億 | 2004 | 95億 | 2020 | 211億 |
| 1989 | 39.3億 | 2005 | 238億 | 2021 | 480億 |
| 1990 | 79.4億 | 2006 | 385億 | 2022 | 665億 |
| 1991 | 13.6億 | 2007 | 197億 | 2023 | 738億 |
| 1992 | 22.7億 | 2008 | 223億 | 2024 | 850億 |
| 1993 | 30.5億 | 2009 | 78.5億 | 2025 | 872億 |
| 1994 | 2,900万 | 2010 | 122億 | 2026 | 709億 |
| 1995 | 1.08億 | 2011 | 435億 | | |
表を表示
| 1980 | 24.2% | 1996 | 6% | 2012 | 18.6% |
| 1981 | 23.2% | 1997 | 11.3% | 2013 | 17.9% |
| 1982 | 16.2% | 1998 | 3.9% | 2014 | 12.8% |
| 1983 | 13.3% | 1999 | 6.4% | 2015 | 4.6% |
| 1984 | 19% | 2000 | 16.3% | 2016 | 3.5% |
| 1985 | 17.9% | 2001 | 9.1% | 2017 | 6.8% |
| 1986 | 7.8% | 2002 | 3.3% | 2018 | 9.4% |
| 1987 | 11.1% | 2003 | 5.8% | 2019 | 8.6% |
| 1988 | 7.4% | 2004 | 6.4% | 2020 | 5.9% |
| 1989 | 10% | 2005 | 13.2% | 2021 | 11.4% |
| 1990 | 15.7% | 2006 | 17.3% | 2022 | 13% |
| 1991 | 2.8% | 2007 | 7.6% | 2023 | 14.1% |
| 1992 | 4.4% | 2008 | 7.1% | 2024 | 15.4% |
| 1993 | 5.8% | 2009 | 3.1% | 2025 | 15.3% |
| 1994 | 0.1% | 2010 | 4% | 2026 | 11.4% |
| 1995 | 0.2% | 2011 | 11.8% | | |