| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 9.313 |
| 2020 | 9.078 |
| 2019 | 8.878 |
| 2018 | 8.721 |
| 2017 | 8.502 |
| 2016 | 8.327 |
| 2015 | 8.088 |
| 2014 | 8.183 |
| 2013 | 8.305 |
| 2012 | 8.468 |
| 2011 | 8.609 |
| 2010 | 8.71 |
| 2009 | 8.95 |
| 2008 | 9.338 |
| 2007 | 9.148 |
| 2006 | 8.843 |
| 2005 | 8.501 |
| 2004 | 8.189 |
| 2003 | 7.899 |
| 2002 | 11.138 |
| 2001 | 10.97 |
| 2000 | 10.763 |
| 1999 | 10.567 |
| 1998 | 10.328 |
| 1997 | 10.129 |
| 1996 | 9.988 |
| 1995 | 9.856 |
| 1994 | 5.89 |
| 1993 | 5.263 |
| 1992 | 5.554 |
| 1991 | 5.62 |
| 1990 | 5.578 |
| 1989 | 5.559 |
| 1988 | 5.57 |
| 1987 | 5.62 |
| 1986 | 5.649 |
| 1985 | 5.736 |
| 1984 | 5.833 |
| 1983 | 5.945 |
| 1982 | 6.065 |
| 1981 | 6.194 |
| 1980 | 6.32 |
| 1979 | 6.451 |
| 1978 | 6.583 |
| 1977 | 6.756 |
| 1976 | 6.957 |
| 1975 | 7.247 |
| 1974 | 7.513 |
| 1973 | 7.855 |
| 1972 | 8.265 |
| 1971 | 8.561 |
| 1970 | 8.915 |
| 1969 | 9.27 |
| 1968 | 9.703 |
| 1967 | 10.144 |
| 1966 | 10.433 |
| 1965 | 10.765 |
| 1964 | 11.096 |
| 1963 | 11.357 |
| 1962 | 11.475 |
| 1961 | 11.649 |
| 1960 | 11.909 |