데이터 표
| 1971 | 2,907만 | 1990 | 14.5억 | 2009 | 33.7억 |
| 1972 | 5,452만 | 1991 | 12.5억 | 2010 | 36.7억 |
| 1973 | 8,983만 | 1992 | 15.2억 | 2011 | 50억 |
| 1974 | 2.56억 | 1993 | 14.4억 | 2012 | 92.5억 |
| 1975 | 5.23억 | 1994 | 15.2억 | 2013 | 87.7억 |
| 1976 | 5.89억 | 1995 | 15.1억 | 2014 | 82.1억 |
| 1977 | 5.15억 | 1996 | 14.4억 | 2015 | 75.3억 |
| 1978 | 5.74억 | 1997 | 14.8억 | 2016 | 79.4억 |
| 1979 | 5.84억 | 1998 | 13.2억 | 2017 | 68억 |
| 1980 | 8.84억 | 1999 | 13.4억 | 2018 | 75.7억 |
| 1981 | 11.3억 | 2000 | 15.8억 | 2019 | 65.5억 |
| 1982 | 12.6억 | 2001 | 18.2억 | 2020 | 61억 |
| 1983 | 14.6억 | 2002 | 18.7억 | 2021 | 57.8억 |
| 1984 | 15.8억 | 2003 | 19.7억 | 2022 | 57.8억 |
| 1985 | 16.2억 | 2004 | 22.3억 | 2023 | 58.5억 |
| 1986 | 13.1억 | 2005 | 27.4억 | 2024 | 59.9억 |
| 1987 | 11.4억 | 2006 | 30.2억 | 2025 | 59.9억 |
| 1988 | 11.5억 | 2007 | 32.4억 | | |
| 1989 | 11.7억 | 2008 | 34.6억 | | |
데이터 표
| 1971 | 9.7% | 1990 | 12.4% | 2009 | 6.1% |
| 1972 | 14.9% | 1991 | 11.1% | 2010 | 5.6% |
| 1973 | 18.6% | 1992 | 12.2% | 2011 | 6.5% |
| 1974 | 15.5% | 1993 | 11.5% | 2012 | 10.6% |
| 1975 | 25% | 1994 | 11.8% | 2013 | 9.7% |
| 1976 | 23% | 1995 | 11% | 2014 | 8.9% |
| 1977 | 18.8% | 1996 | 9.4% | 2015 | 9.6% |
| 1978 | 20.9% | 1997 | 9.4% | 2016 | 10.6% |
| 1979 | 15.6% | 1998 | 8.2% | 2017 | 8.4% |
| 1980 | 14.9% | 1999 | 7.5% | 2018 | 8.3% |
| 1981 | 15.7% | 2000 | 7.1% | 2019 | 7.4% |
| 1982 | 16.7% | 2001 | 8.2% | 2020 | 8% |
| 1983 | 17.2% | 2002 | 8.1% | 2021 | 6.6% |
| 1984 | 16.9% | 2003 | 8% | 2022 | 5.3% |
| 1985 | 15.6% | 2004 | 7.9% | 2023 | 5.5% |
| 1986 | 15.9% | 2005 | 7.7% | 2024 | 5.6% |
| 1987 | 13.2% | 2006 | 7.1% | 2025 | 5.7% |
| 1988 | 13.7% | 2007 | 6.7% | | |
| 1989 | 12.5% | 2008 | 5% | | |