| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 18.8979 |
| 2021 | 18.9483 |
| 2020 | 19.0134 |
| 2019 | 19.1085 |
| 2018 | 19.232 |
| 2017 | 19.3871 |
| 2016 | 19.5889 |
| 2015 | 19.8277 |
| 2014 | 20.1023 |
| 2013 | 20.4291 |
| 2012 | 20.8055 |
| 2011 | 21.2387 |
| 2010 | 21.7198 |
| 2009 | 22.1882 |
| 2008 | 22.633 |
| 2007 | 23.0853 |
| 2006 | 23.5347 |
| 2005 | 23.9525 |
| 2004 | 24.3167 |
| 2003 | 24.6503 |
| 2002 | 24.9867 |
| 2001 | 25.3061 |
| 2000 | 25.5898 |
| 1999 | 25.8306 |
| 1998 | 26.0275 |
| 1997 | 26.1976 |
| 1996 | 26.3417 |
| 1995 | 26.448 |
| 1994 | 26.4905 |
| 1993 | 26.4826 |
| 1992 | 26.4713 |
| 1991 | 26.5001 |
| 1990 | 26.6568 |
| 1989 | 26.9693 |
| 1988 | 27.4287 |
| 1987 | 28.164 |
| 1986 | 29.0647 |
| 1985 | 29.9947 |
| 1984 | 31.0096 |
| 1983 | 32.0657 |
| 1982 | 33.1955 |
| 1981 | 34.2714 |
| 1980 | 35.1878 |
| 1979 | 36.0457 |
| 1978 | 36.9113 |
| 1977 | 37.7169 |
| 1976 | 38.3569 |
| 1975 | 38.9159 |
| 1974 | 39.4209 |
| 1973 | 39.9647 |
| 1972 | 40.4414 |
| 1971 | 40.5436 |
| 1970 | 40.4069 |
| 1969 | 40.1504 |
| 1968 | 39.655 |
| 1967 | 38.7971 |
| 1966 | 37.7412 |
| 1965 | 37.1754 |
| 1964 | 37.0593 |
| 1963 | 36.951 |
| 1962 | 37.0462 |
| 1961 | 37.4214 |
| 1960 | 37.8553 |