데이터 표
| 1968 | 1.5억 | 1988 | 10.3억 | 2008 | 18.7억 |
| 1969 | 1.73억 | 1989 | 8.13억 | 2009 | 14.8억 |
| 1970 | 2.23억 | 1990 | 8.47억 | 2010 | 13.5억 |
| 1971 | 2.26억 | 1991 | 7.23억 | 2011 | 14.7억 |
| 1972 | 2.32억 | 1992 | 8.12억 | 2012 | 13.2억 |
| 1973 | 2.63억 | 1993 | 7.36억 | 2013 | 12.8억 |
| 1974 | 3.08억 | 1994 | 7.57억 | 2014 | 12.1억 |
| 1975 | 3.66억 | 1995 | 6.12억 | 2015 | 11.3억 |
| 1976 | 3.82억 | 1996 | 5.85억 | 2016 | 12.9억 |
| 1977 | 4.2억 | 1997 | 6.96억 | 2017 | 17.1억 |
| 1978 | 5.38억 | 1998 | 6.18억 | 2018 | 16.2억 |
| 1979 | 6.21억 | 1999 | 7.03억 | 2019 | 21.9억 |
| 1980 | 7.41억 | 2000 | 7.16억 | 2020 | 27.7억 |
| 1981 | 7.58억 | 2001 | 8.45억 | 2021 | 24.1억 |
| 1982 | 7.51억 | 2002 | 10.8억 | 2022 | 32.6억 |
| 1983 | 7.01억 | 2003 | 14억 | 2023 | 43.6억 |
| 1984 | 6.41억 | 2004 | 15.3억 | 2024 | 47.3억 |
| 1985 | 10.3억 | 2005 | 16억 | 2025 | 50억 |
| 1986 | 7.66억 | 2006 | 14.1억 | | |
| 1987 | 8.24억 | 2007 | 17.8억 | | |
데이터 표
| 1970 | 4% | 1989 | 2.8% | 2008 | 1.2% |
| 1971 | 3.7% | 1990 | 2.6% | 2009 | 1.1% |
| 1972 | 3.3% | 1991 | 2.2% | 2010 | 1% |
| 1973 | 3% | 1992 | 2.2% | 2011 | 1% |
| 1974 | 3.2% | 1993 | 1.9% | 2012 | 1% |
| 1975 | 3.3% | 1994 | 1.8% | 2013 | 0.9% |
| 1976 | 3% | 1995 | 1.3% | 2014 | 0.9% |
| 1977 | 3% | 1996 | 1.2% | 2015 | 0.9% |
| 1978 | 3.2% | 1997 | 1.5% | 2016 | 1% |
| 1979 | 3.2% | 1998 | 1.3% | 2017 | 1.2% |
| 1980 | 3.3% | 1999 | 1.4% | 2018 | 1% |
| 1981 | 3.3% | 2000 | 1.5% | 2019 | 1.3% |
| 1982 | 3.2% | 2001 | 1.6% | 2020 | 1.7% |
| 1983 | 3.3% | 2002 | 1.6% | 2021 | 1.3% |
| 1984 | 3.1% | 2003 | 1.6% | 2022 | 1.8% |
| 1985 | 5% | 2004 | 1.5% | 2023 | 2% |
| 1986 | 3.2% | 2005 | 1.4% | 2024 | 2.1% |
| 1987 | 3.2% | 2006 | 1.2% | 2025 | 2% |
| 1988 | 3.6% | 2007 | 1.3% | | |