| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 6.95128 |
| 2021 | 6.5811 |
| 2020 | 6.3227 |
| 2019 | 6.13568 |
| 2018 | 6.02918 |
| 2017 | 6.03887 |
| 2016 | 6.00042 |
| 2015 | 5.84874 |
| 2014 | 5.64312 |
| 2013 | 5.26212 |
| 2012 | 4.67707 |
| 2011 | 4.14233 |
| 2010 | 3.89754 |
| 2009 | 3.87151 |
| 2008 | 3.96342 |
| 2007 | 4.24936 |
| 2006 | 4.68635 |
| 2005 | 4.96366 |
| 2004 | 5.05384 |
| 2003 | 5.16146 |
| 2002 | 5.25192 |
| 2001 | 5.32443 |
| 2000 | 5.40609 |
| 1999 | 5.50407 |
| 1998 | 5.59417 |
| 1997 | 5.64958 |
| 1996 | 5.65181 |
| 1995 | 5.59287 |
| 1994 | 5.47886 |
| 1993 | 5.31434 |
| 1992 | 5.11054 |
| 1991 | 4.90394 |
| 1990 | 4.71582 |
| 1989 | 4.54478 |
| 1988 | 4.38476 |
| 1987 | 4.24401 |
| 1986 | 4.12549 |
| 1985 | 4.01645 |
| 1984 | 3.91009 |
| 1983 | 3.81122 |
| 1982 | 3.71778 |
| 1981 | 3.6147 |
| 1980 | 3.50575 |
| 1979 | 3.39619 |
| 1978 | 3.28549 |
| 1977 | 3.16828 |
| 1976 | 3.04294 |
| 1975 | 2.908 |
| 1974 | 2.76716 |
| 1973 | 2.63128 |
| 1972 | 2.51936 |
| 1971 | 2.44132 |
| 1970 | 2.40315 |
| 1969 | 2.40431 |
| 1968 | 2.43098 |
| 1967 | 2.47526 |
| 1966 | 2.52106 |
| 1965 | 2.55817 |
| 1964 | 2.58872 |
| 1963 | 2.61557 |
| 1962 | 2.63544 |
| 1961 | 2.64756 |
| 1960 | 2.65914 |