데이터 표
| 1962 | 3.05억 | 1984 | 25.3억 | 2006 | 18.5억 |
| 1963 | 2.42억 | 1985 | 20.3억 | 2007 | 23억 |
| 1964 | 2.46억 | 1986 | 24.5억 | 2008 | 27.9억 |
| 1965 | 2.52억 | 1987 | 24.9억 | 2009 | 29.8억 |
| 1966 | 2.79억 | 1988 | 27억 | 2010 | 34.8억 |
| 1967 | 2.52억 | 1989 | 14.4억 | 2011 | 40.5억 |
| 1968 | 3.37억 | 1990 | 20.5억 | 2012 | 45.6억 |
| 1969 | 4.43억 | 1991 | 28.6억 | 2013 | 51.4억 |
| 1970 | 4.46억 | 1992 | 32.5억 | 2014 | 49.8억 |
| 1971 | 5.2억 | 1993 | 33.7억 | 2015 | 54.8억 |
| 1972 | 7.66억 | 1994 | 37.5억 | 2016 | 45.1억 |
| 1973 | 12.9억 | 1995 | 38억 | 2017 | 54.6억 |
| 1974 | 16.3억 | 1996 | 33.8억 | 2018 | 38.4억 |
| 1975 | 7.98억 | 1997 | 33.4억 | 2019 | 31.3억 |
| 1976 | 20.5억 | 1998 | 34억 | 2020 | 28.3억 |
| 1977 | 20.6억 | 1999 | 34.6억 | 2021 | 30.7억 |
| 1978 | 31억 | 2000 | 32.7억 | 2022 | 43.4억 |
| 1979 | 50.6억 | 2001 | 31.8억 | 2023 | 48.8억 |
| 1980 | 64.8억 | 2002 | 11.1억 | 2024 | 41.8억 |
| 1981 | 58.8억 | 2003 | 13.7억 | 2025 | 38.8억 |
| 1982 | 22.8억 | 2004 | 14.7억 | | |
| 1983 | 28.5억 | 2005 | 17억 | | |
데이터 표
| 1950 | 2.9% | 1981 | 3.5% | 2004 | 0.9% |
| 1959 | 0.8% | 1982 | 2.7% | 2005 | 0.8% |
| 1960 | 1.6% | 1983 | 2.7% | 2006 | 0.8% |
| 1961 | 2.1% | 1984 | 2.2% | 2007 | 0.8% |
| 1962 | 2.7% | 1985 | 2.3% | 2008 | 0.8% |
| 1963 | 1.7% | 1986 | 2.3% | 2009 | 0.9% |
| 1964 | 1.2% | 1987 | 2.3% | 2010 | 0.8% |
| 1965 | 1.1% | 1988 | 2.1% | 2011 | 0.8% |
| 1966 | 1.2% | 1989 | 1.9% | 2012 | 0.8% |
| 1967 | 1.4% | 1990 | 1.5% | 2013 | 0.8% |
| 1968 | 1.7% | 1991 | 1.5% | 2014 | 0.9% |
| 1969 | 1.9% | 1992 | 1.4% | 2015 | 0.9% |
| 1970 | 1.9% | 1993 | 1.4% | 2016 | 0.8% |
| 1971 | 1.8% | 1994 | 1.5% | 2017 | 0.8% |
| 1972 | 1.8% | 1995 | 1.5% | 2018 | 0.7% |
| 1973 | 1.8% | 1996 | 1.2% | 2019 | 0.7% |
| 1974 | 1.7% | 1997 | 1.1% | 2020 | 0.7% |
| 1975 | 2% | 1998 | 1.1% | 2021 | 0.6% |
| 1976 | 3.8% | 1999 | 1.2% | 2022 | 0.7% |
| 1977 | 4% | 2000 | 1.1% | 2023 | 0.8% |
| 1978 | 4.7% | 2001 | 1.2% | 2024 | 0.7% |
| 1979 | 4.7% | 2002 | 1.1% | 2025 | 0.6% |
| 1980 | 3.1% | 2003 | 1.1% | | |