데이터 표
| 1955 | 1.43억 | 1976 | 5.93억 | 1997 | 15.4억 |
| 1956 | 1.73억 | 1977 | 7.49억 | 1998 | 14.5억 |
| 1957 | 2.29억 | 1978 | 8.28억 | 1999 | 14.1억 |
| 1958 | 2.52억 | 1979 | 9.26억 | 2000 | 17.9억 |
| 1959 | 2.26억 | 1980 | 10억 | 2001 | 19.1억 |
| 1960 | 2.34억 | 1981 | 10.1억 | 2002 | 10.7억 |
| 1961 | 1.15억 | 1982 | 15.2억 | 2003 | 9.88억 |
| 1962 | 2.04억 | 1983 | 20.1억 | 2004 | 14.5억 |
| 1963 | 2.45억 | 1984 | 13.3억 | 2005 | 26.7억 |
| 1964 | 2억 | 1985 | 8.2억 | 2006 | 36.3억 |
| 1965 | 2.27억 | 1986 | 10억 | 2007 | 43.5억 |
| 1966 | 2.39억 | 1987 | 7.66억 | 2008 | 56.6억 |
| 1967 | 2.7억 | 1988 | 11억 | 2009 | 40.6억 |
| 1968 | 2.73억 | 1989 | 12억 | 2010 | 39.9억 |
| 1969 | 2.64억 | 1990 | 7.38억 | 2011 | 35.8억 |
| 1970 | 2.73억 | 1991 | 9.84억 | 2012 | 51.1억 |
| 1971 | 3.52억 | 1992 | 9.93억 | 2013 | 62억 |
| 1972 | 4.05억 | 1993 | 12.9억 | 2014 | 15.5억 |
| 1973 | 4.21억 | 1994 | 9.4억 | 2015 | 3.21억 |
| 1974 | 6.02억 | 1995 | 12억 | 2016 | 2.18억 |
| 1975 | 7.12억 | 1996 | 7.33억 | 2017 | 21.3억 |
데이터 표
| 1955 | 2.6% | 1976 | 1.9% | 1997 | 1.8% |
| 1956 | 2.8% | 1977 | 2.1% | 1998 | 1.6% |
| 1957 | 3.2% | 1978 | 2.1% | 1999 | 1.4% |
| 1958 | 3.4% | 1979 | 1.9% | 2000 | 1.5% |
| 1959 | 3% | 1980 | 1.7% | 2001 | 1.6% |
| 1960 | 3.1% | 1981 | 1.5% | 2002 | 1.2% |
| 1961 | 1.4% | 1982 | 2.2% | 2003 | 1.2% |
| 1962 | 2.3% | 1983 | 3% | 2004 | 1.3% |
| 1963 | 2.6% | 1984 | 2.3% | 2005 | 1.8% |
| 1964 | 2.4% | 1985 | 1.4% | 2006 | 2% |
| 1965 | 2.6% | 1986 | 1.6% | 2007 | 1.9% |
| 1966 | 2.7% | 1987 | 1.6% | 2008 | 1.8% |
| 1967 | 2.9% | 1988 | 1.8% | 2009 | 1.2% |
| 1968 | 2.7% | 1989 | 2.8% | 2010 | 1% |
| 1969 | 2.5% | 1990 | 1.5% | 2011 | 1.1% |
| 1970 | 2.3% | 1991 | 1.8% | 2012 | 1.3% |
| 1971 | 2.7% | 1992 | 1.6% | 2013 | 1.7% |
| 1972 | 2.8% | 1993 | 2.1% | 2014 | 1.2% |
| 1973 | 2.5% | 1994 | 1.6% | 2015 | 0.9% |
| 1974 | 2.3% | 1995 | 1.5% | 2016 | 0.5% |
| 1975 | 2.6% | 1996 | 1% | 2017 | 2.2% |