| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 6.94327 |
| 2021 | 6.57647 |
| 2020 | 6.32305 |
| 2019 | 6.14133 |
| 2018 | 6.0402 |
| 2017 | 6.05626 |
| 2016 | 6.02736 |
| 2015 | 5.88444 |
| 2014 | 5.68409 |
| 2013 | 5.30169 |
| 2012 | 4.70612 |
| 2011 | 4.1554 |
| 2010 | 3.87924 |
| 2009 | 3.79364 |
| 2008 | 3.81594 |
| 2007 | 4.04631 |
| 2006 | 4.44134 |
| 2005 | 4.68676 |
| 2004 | 4.76757 |
| 2003 | 4.8775 |
| 2002 | 4.95568 |
| 2001 | 5.0013 |
| 2000 | 5.04622 |
| 1999 | 5.10059 |
| 1998 | 5.14399 |
| 1997 | 5.14582 |
| 1996 | 5.08379 |
| 1995 | 4.94986 |
| 1994 | 4.74743 |
| 1993 | 4.46342 |
| 1992 | 4.11328 |
| 1991 | 3.74496 |
| 1990 | 3.39175 |
| 1989 | 3.05874 |
| 1988 | 2.75541 |
| 1987 | 2.50842 |
| 1986 | 2.31833 |
| 1985 | 2.16753 |
| 1984 | 2.04827 |
| 1983 | 1.971 |
| 1982 | 1.92138 |
| 1981 | 1.88355 |
| 1980 | 1.85876 |
| 1979 | 1.84668 |
| 1978 | 1.84128 |
| 1977 | 1.83645 |
| 1976 | 1.83166 |
| 1975 | 1.83202 |
| 1974 | 1.83966 |
| 1973 | 1.86062 |
| 1972 | 1.90059 |
| 1971 | 1.94317 |
| 1970 | 1.96925 |
| 1969 | 1.97558 |
| 1968 | 1.95588 |
| 1967 | 1.91389 |
| 1966 | 1.87626 |
| 1965 | 1.86117 |
| 1964 | 1.86939 |
| 1963 | 1.90492 |
| 1962 | 1.96658 |
| 1961 | 2.02873 |
| 1960 | 2.0786 |