| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 6.27418 |
| 2021 | 6.38499 |
| 2020 | 6.53842 |
| 2019 | 6.68627 |
| 2018 | 6.80802 |
| 2017 | 6.94936 |
| 2016 | 7.12723 |
| 2015 | 7.31541 |
| 2014 | 7.49642 |
| 2013 | 7.68217 |
| 2012 | 7.86706 |
| 2011 | 8.04399 |
| 2010 | 8.22321 |
| 2009 | 8.39956 |
| 2008 | 8.56683 |
| 2007 | 8.71857 |
| 2006 | 8.82823 |
| 2005 | 8.88072 |
| 2004 | 8.87513 |
| 2003 | 8.82744 |
| 2002 | 8.75857 |
| 2001 | 8.69476 |
| 2000 | 8.65794 |
| 1999 | 8.64584 |
| 1998 | 8.6402 |
| 1997 | 8.63382 |
| 1996 | 8.63284 |
| 1995 | 8.62694 |
| 1994 | 8.63093 |
| 1993 | 8.6405 |
| 1992 | 8.64211 |
| 1991 | 8.67242 |
| 1990 | 8.82736 |
| 1989 | 9.13336 |
| 1988 | 9.60071 |
| 1987 | 10.3738 |
| 1986 | 11.2883 |
| 1985 | 12.1077 |
| 1984 | 12.8543 |
| 1983 | 13.4777 |
| 1982 | 13.8592 |
| 1981 | 13.9953 |
| 1980 | 13.9191 |
| 1979 | 13.68 |
| 1978 | 13.3938 |
| 1977 | 12.9483 |
| 1976 | 12.4153 |
| 1975 | 12.0967 |
| 1974 | 11.9273 |
| 1973 | 11.9357 |
| 1972 | 12.2262 |
| 1971 | 12.4516 |
| 1970 | 12.4471 |
| 1969 | 12.3381 |
| 1968 | 11.8305 |
| 1967 | 10.8246 |
| 1966 | 9.85374 |
| 1965 | 9.49284 |
| 1964 | 9.59159 |
| 1963 | 9.94949 |
| 1962 | 10.848 |
| 1961 | 12.193 |
| 1960 | 13.1849 |