| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 5.86344 |
| 2021 | 5.95584 |
| 2020 | 6.08476 |
| 2019 | 6.20652 |
| 2018 | 6.30288 |
| 2017 | 6.41728 |
| 2016 | 6.56446 |
| 2015 | 6.71892 |
| 2014 | 6.86717 |
| 2013 | 7.0215 |
| 2012 | 7.1751 |
| 2011 | 7.32282 |
| 2010 | 7.47592 |
| 2009 | 7.62882 |
| 2008 | 7.77634 |
| 2007 | 7.91298 |
| 2006 | 8.01334 |
| 2005 | 8.06231 |
| 2004 | 8.05853 |
| 2003 | 8.01481 |
| 2002 | 7.94724 |
| 2001 | 7.8798 |
| 2000 | 7.83435 |
| 1999 | 7.8105 |
| 1998 | 7.79305 |
| 1997 | 7.77604 |
| 1996 | 7.76448 |
| 1995 | 7.74873 |
| 1994 | 7.74272 |
| 1993 | 7.7438 |
| 1992 | 7.73771 |
| 1991 | 7.7556 |
| 1990 | 7.88439 |
| 1989 | 8.14713 |
| 1988 | 8.55262 |
| 1987 | 9.22885 |
| 1986 | 10.0279 |
| 1985 | 10.74 |
| 1984 | 11.3857 |
| 1983 | 11.9199 |
| 1982 | 12.2392 |
| 1981 | 12.3412 |
| 1980 | 12.2554 |
| 1979 | 12.0269 |
| 1978 | 11.7585 |
| 1977 | 11.3512 |
| 1976 | 10.8667 |
| 1975 | 10.5673 |
| 1974 | 10.3943 |
| 1973 | 10.3711 |
| 1972 | 10.5833 |
| 1971 | 10.7308 |
| 1970 | 10.6779 |
| 1969 | 10.5351 |
| 1968 | 10.057 |
| 1967 | 9.16482 |
| 1966 | 8.31841 |
| 1965 | 8.01514 |
| 1964 | 8.14994 |
| 1963 | 8.52792 |
| 1962 | 9.32652 |
| 1961 | 10.4618 |
| 1960 | 11.2733 |