| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 8.24051 |
| 2021 | 8.22002 |
| 2020 | 8.07776 |
| 2019 | 7.84677 |
| 2018 | 7.59587 |
| 2017 | 7.26163 |
| 2016 | 6.88284 |
| 2015 | 6.61954 |
| 2014 | 6.4261 |
| 2013 | 6.31234 |
| 2012 | 6.31974 |
| 2011 | 6.27545 |
| 2010 | 6.11341 |
| 2009 | 5.90181 |
| 2008 | 5.51233 |
| 2007 | 4.90884 |
| 2006 | 4.35698 |
| 2005 | 4.11214 |
| 2004 | 4.09846 |
| 2003 | 4.20657 |
| 2002 | 4.51932 |
| 2001 | 4.99346 |
| 2000 | 5.30182 |
| 1999 | 5.41408 |
| 1998 | 5.5476 |
| 1997 | 5.66422 |
| 1996 | 5.76128 |
| 1995 | 5.86833 |
| 1994 | 5.99466 |
| 1993 | 6.11195 |
| 1992 | 6.18718 |
| 1991 | 6.19943 |
| 1990 | 6.13958 |
| 1989 | 6.01592 |
| 1988 | 5.83839 |
| 1987 | 5.61888 |
| 1986 | 5.39567 |
| 1985 | 5.1937 |
| 1984 | 5.01108 |
| 1983 | 4.84028 |
| 1982 | 4.69011 |
| 1981 | 4.56438 |
| 1980 | 4.44843 |
| 1979 | 4.33502 |
| 1978 | 4.2293 |
| 1977 | 4.12881 |
| 1976 | 4.01873 |
| 1975 | 3.90729 |
| 1974 | 3.80098 |
| 1973 | 3.69905 |
| 1972 | 3.60077 |
| 1971 | 3.49686 |
| 1970 | 3.376 |
| 1969 | 3.2437 |
| 1968 | 3.11123 |
| 1967 | 2.99827 |
| 1966 | 2.91704 |
| 1965 | 2.87581 |
| 1964 | 2.87625 |
| 1963 | 2.90587 |
| 1962 | 2.95106 |
| 1961 | 2.99368 |
| 1960 | 3.03222 |