| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 7.02284 |
| 2021 | 7.56275 |
| 2020 | 8.03118 |
| 2019 | 8.44481 |
| 2018 | 8.77172 |
| 2017 | 8.93474 |
| 2016 | 8.93643 |
| 2015 | 8.80503 |
| 2014 | 8.56984 |
| 2013 | 8.30274 |
| 2012 | 7.93765 |
| 2011 | 7.51836 |
| 2010 | 7.22158 |
| 2009 | 7.00708 |
| 2008 | 6.88666 |
| 2007 | 6.89963 |
| 2006 | 6.8599 |
| 2005 | 6.69421 |
| 2004 | 6.47187 |
| 2003 | 6.05014 |
| 2002 | 5.38893 |
| 2001 | 4.78102 |
| 2000 | 4.49904 |
| 1999 | 4.44367 |
| 1998 | 4.51003 |
| 1997 | 4.8208 |
| 1996 | 5.33035 |
| 1995 | 5.67066 |
| 1994 | 5.82099 |
| 1993 | 6.00793 |
| 1992 | 6.15206 |
| 1991 | 6.24935 |
| 1990 | 6.34094 |
| 1989 | 6.43857 |
| 1988 | 6.51779 |
| 1987 | 6.54097 |
| 1986 | 6.47788 |
| 1985 | 6.31733 |
| 1984 | 6.06811 |
| 1983 | 5.71763 |
| 1982 | 5.2824 |
| 1981 | 4.82235 |
| 1980 | 4.38001 |
| 1979 | 3.96222 |
| 1978 | 3.57987 |
| 1977 | 3.26766 |
| 1976 | 3.02933 |
| 1975 | 2.84537 |
| 1974 | 2.70652 |
| 1973 | 2.62626 |
| 1972 | 2.59144 |
| 1971 | 2.5778 |
| 1970 | 2.58306 |
| 1969 | 2.60958 |
| 1968 | 2.64813 |
| 1967 | 2.69201 |
| 1966 | 2.7342 |
| 1965 | 2.77415 |
| 1964 | 2.81846 |
| 1963 | 2.87952 |
| 1962 | 2.95694 |
| 1961 | 3.02419 |
| 1960 | 3.06423 |