| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 7.00153 |
| 2021 | 6.95865 |
| 2020 | 6.90961 |
| 2019 | 6.86049 |
| 2018 | 6.80747 |
| 2017 | 6.74749 |
| 2016 | 6.71054 |
| 2015 | 6.77088 |
| 2014 | 6.94272 |
| 2013 | 7.22726 |
| 2012 | 7.73048 |
| 2011 | 8.32303 |
| 2010 | 8.829 |
| 2009 | 9.27322 |
| 2008 | 9.62192 |
| 2007 | 9.78948 |
| 2006 | 9.7813 |
| 2005 | 9.63042 |
| 2004 | 9.37642 |
| 2003 | 9.10003 |
| 2002 | 8.71873 |
| 2001 | 8.28238 |
| 2000 | 7.98968 |
| 1999 | 7.79124 |
| 1998 | 7.70178 |
| 1997 | 7.76736 |
| 1996 | 7.77618 |
| 1995 | 7.64276 |
| 1994 | 7.44826 |
| 1993 | 7.02176 |
| 1992 | 6.30503 |
| 1991 | 5.63445 |
| 1990 | 5.33749 |
| 1989 | 5.30404 |
| 1988 | 5.41017 |
| 1987 | 5.80685 |
| 1986 | 6.44145 |
| 1985 | 6.87189 |
| 1984 | 7.06845 |
| 1983 | 7.30657 |
| 1982 | 7.49484 |
| 1981 | 7.62818 |
| 1980 | 7.75561 |
| 1979 | 7.89151 |
| 1978 | 8.00423 |
| 1977 | 8.04639 |
| 1976 | 7.98472 |
| 1975 | 7.81342 |
| 1974 | 7.54523 |
| 1973 | 7.16175 |
| 1972 | 6.69183 |
| 1971 | 6.19382 |
| 1970 | 5.70809 |
| 1969 | 5.24747 |
| 1968 | 4.82277 |
| 1967 | 4.48503 |
| 1966 | 4.23274 |
| 1965 | 4.0318 |
| 1964 | 3.87894 |
| 1963 | 3.80048 |
| 1962 | 3.76846 |
| 1961 | 3.74958 |
| 1960 | 3.75736 |