데이터 표
| 1962 | 2.5억 | 1984 | 37.4억 | 2006 | 29.5억 |
| 1963 | 3.36억 | 1985 | 42억 | 2007 | 33.1억 |
| 1964 | 4.48억 | 1986 | 47.3억 | 2008 | 37.8억 |
| 1965 | 5.15억 | 1987 | 48.1억 | 2009 | 40.2억 |
| 1966 | 4.82억 | 1988 | 44.5억 | 2010 | 44.1억 |
| 1967 | 5.08억 | 1989 | 35.2억 | 2011 | 44.6억 |
| 1968 | 6.49억 | 1990 | 22.6억 | 2012 | 45.6억 |
| 1969 | 8.89억 | 1991 | 13.5억 | 2013 | 43.6억 |
| 1970 | 10.9억 | 1992 | 14.2억 | 2014 | 50.9억 |
| 1971 | 12.7억 | 1993 | 15.3억 | 2015 | 54.8억 |
| 1972 | 10.7억 | 1994 | 17.1억 | 2016 | 45.1억 |
| 1973 | 12.4억 | 1995 | 19.5억 | 2017 | 27.7억 |
| 1974 | 18.5억 | 1996 | 21.2억 | 2018 | 31.2억 |
| 1975 | 19.3억 | 1997 | 22.7억 | 2019 | 37.4억 |
| 1976 | 22억 | 1998 | 23.7억 | 2020 | 45.1억 |
| 1977 | 27.5억 | 1999 | 24.5억 | 2021 | 51.7억 |
| 1978 | 24.9억 | 2000 | 26.3억 | 2022 | 46.5억 |
| 1979 | 11.5억 | 2001 | 28.3억 | 2023 | 31.7억 |
| 1980 | 13.6억 | 2002 | 29억 | 2024 | 24억 |
| 1981 | 18.2억 | 2003 | 23.8억 | 2025 | 25억 |
| 1982 | 23.1억 | 2004 | 23.7억 | | |
| 1983 | 30억 | 2005 | 26.6억 | | |
데이터 표
| 1962 | 6.7% | 1984 | 8.3% | 2006 | 2.6% |
| 1963 | 8.7% | 1985 | 7.9% | 2007 | 2.4% |
| 1964 | 10.3% | 1986 | 7.5% | 2008 | 2.2% |
| 1965 | 10.1% | 1987 | 6.5% | 2009 | 2% |
| 1966 | 8.7% | 1988 | 5.1% | 2010 | 2% |
| 1967 | 8.9% | 1989 | 4% | 2011 | 1.8% |
| 1968 | 11.1% | 1990 | 3.5% | 2012 | 1.6% |
| 1969 | 14.3% | 1991 | 3.6% | 2013 | 1.6% |
| 1970 | 16% | 1992 | 3.2% | 2014 | 1.7% |
| 1971 | 17.2% | 1993 | 3.1% | 2015 | 1.7% |
| 1972 | 13.6% | 1994 | 3.2% | 2016 | 1.7% |
| 1973 | 13.5% | 1995 | 3.1% | 2017 | 1.4% |
| 1974 | 17.3% | 1996 | 3% | 2018 | 1.2% |
| 1975 | 15.4% | 1997 | 2.8% | 2019 | 1.2% |
| 1976 | 13.7% | 1998 | 2.7% | 2020 | 1.1% |
| 1977 | 13.1% | 1999 | 2.6% | 2021 | 1.1% |
| 1978 | 9.9% | 2000 | 2.6% | 2022 | 1% |
| 1979 | 6.5% | 2001 | 3% | 2023 | 0.8% |
| 1980 | 6.2% | 2002 | 3.3% | 2024 | 0.7% |
| 1981 | 7.4% | 2003 | 3.2% | 2025 | 0.6% |
| 1982 | 7.2% | 2004 | 2.9% | | |
| 1983 | 8% | 2005 | 2.7% | | |