| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 6.1585 |
| 2021 | 6.10283 |
| 2020 | 6.13589 |
| 2019 | 6.27478 |
| 2018 | 6.52219 |
| 2017 | 6.97091 |
| 2016 | 7.50388 |
| 2015 | 7.96289 |
| 2014 | 8.36288 |
| 2013 | 8.67066 |
| 2012 | 8.81444 |
| 2011 | 8.79706 |
| 2010 | 8.6471 |
| 2009 | 8.40538 |
| 2008 | 8.14542 |
| 2007 | 7.79507 |
| 2006 | 7.39631 |
| 2005 | 7.12247 |
| 2004 | 6.93061 |
| 2003 | 6.8324 |
| 2002 | 6.86307 |
| 2001 | 6.83595 |
| 2000 | 6.68443 |
| 1999 | 6.47807 |
| 1998 | 6.07543 |
| 1997 | 5.43635 |
| 1996 | 4.85077 |
| 1995 | 4.60563 |
| 1994 | 4.62365 |
| 1993 | 4.78304 |
| 1992 | 5.17649 |
| 1991 | 5.75697 |
| 1990 | 6.14813 |
| 1989 | 6.30959 |
| 1988 | 6.49181 |
| 1987 | 6.65182 |
| 1986 | 6.78562 |
| 1985 | 6.92708 |
| 1984 | 7.08438 |
| 1983 | 7.22657 |
| 1982 | 7.32032 |
| 1981 | 7.3411 |
| 1980 | 7.27731 |
| 1979 | 7.13896 |
| 1978 | 6.93611 |
| 1977 | 6.68211 |
| 1976 | 6.42555 |
| 1975 | 6.20169 |
| 1974 | 6.00989 |
| 1973 | 5.8406 |
| 1972 | 5.71319 |
| 1971 | 5.62431 |
| 1970 | 5.54779 |
| 1969 | 5.47823 |
| 1968 | 5.41945 |
| 1967 | 5.37113 |
| 1966 | 5.30299 |
| 1965 | 5.21267 |
| 1964 | 5.11479 |
| 1963 | 5.01334 |
| 1962 | 4.8952 |
| 1961 | 4.75006 |
| 1960 | 4.5809 |