| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 6.64393 |
| 2021 | 6.58759 |
| 2020 | 6.52429 |
| 2019 | 6.46129 |
| 2018 | 6.39513 |
| 2017 | 6.32281 |
| 2016 | 6.27262 |
| 2015 | 6.31382 |
| 2014 | 6.46152 |
| 2013 | 6.7175 |
| 2012 | 7.17821 |
| 2011 | 7.72269 |
| 2010 | 8.18886 |
| 2009 | 8.60093 |
| 2008 | 8.92697 |
| 2007 | 9.08716 |
| 2006 | 9.08501 |
| 2005 | 8.94958 |
| 2004 | 8.71844 |
| 2003 | 8.46705 |
| 2002 | 8.11545 |
| 2001 | 7.70859 |
| 2000 | 7.43357 |
| 1999 | 7.24427 |
| 1998 | 7.1545 |
| 1997 | 7.20697 |
| 1996 | 7.20406 |
| 1995 | 7.06878 |
| 1994 | 6.88104 |
| 1993 | 6.48765 |
| 1992 | 5.8327 |
| 1991 | 5.22426 |
| 1990 | 4.97489 |
| 1989 | 5.0006 |
| 1988 | 5.17182 |
| 1987 | 5.59586 |
| 1986 | 6.223 |
| 1985 | 6.64698 |
| 1984 | 6.8243 |
| 1983 | 7.02442 |
| 1982 | 7.20063 |
| 1981 | 7.34891 |
| 1980 | 7.50495 |
| 1979 | 7.67819 |
| 1978 | 7.83466 |
| 1977 | 7.93781 |
| 1976 | 7.96438 |
| 1975 | 7.9102 |
| 1974 | 7.78786 |
| 1973 | 7.60772 |
| 1972 | 7.39473 |
| 1971 | 7.18684 |
| 1970 | 7.0047 |
| 1969 | 6.85143 |
| 1968 | 6.71328 |
| 1967 | 6.606 |
| 1966 | 6.52544 |
| 1965 | 6.44279 |
| 1964 | 6.35666 |
| 1963 | 6.28074 |
| 1962 | 6.20598 |
| 1961 | 6.10079 |
| 1960 | 5.98427 |