| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 3.12954 |
| 2021 | 3.43563 |
| 2020 | 3.6203 |
| 2019 | 3.66066 |
| 2018 | 3.71436 |
| 2017 | 3.75322 |
| 2016 | 3.77574 |
| 2015 | 3.8032 |
| 2014 | 3.84106 |
| 2013 | 3.87161 |
| 2012 | 3.87755 |
| 2011 | 3.84657 |
| 2010 | 3.77363 |
| 2009 | 3.66627 |
| 2008 | 3.52906 |
| 2007 | 3.36668 |
| 2006 | 3.2025 |
| 2005 | 3.05186 |
| 2004 | 2.91413 |
| 2003 | 2.78468 |
| 2002 | 2.6775 |
| 2001 | 2.59476 |
| 2000 | 2.51946 |
| 1999 | 2.44767 |
| 1998 | 2.3822 |
| 1997 | 2.32107 |
| 1996 | 2.25494 |
| 1995 | 2.18675 |
| 1994 | 2.11184 |
| 1993 | 2.02772 |
| 1992 | 1.93975 |
| 1991 | 1.84815 |
| 1990 | 1.75008 |
| 1989 | 1.64728 |
| 1988 | 1.54614 |
| 1987 | 1.45561 |
| 1986 | 1.38336 |
| 1985 | 1.33495 |
| 1984 | 1.30856 |
| 1983 | 1.29602 |
| 1982 | 1.29176 |
| 1981 | 1.28897 |
| 1980 | 1.28426 |
| 1979 | 1.27701 |
| 1978 | 1.26739 |
| 1977 | 1.25511 |
| 1976 | 1.24206 |
| 1975 | 1.23044 |
| 1974 | 1.21971 |
| 1973 | 1.20804 |
| 1972 | 1.19868 |
| 1971 | 1.19403 |
| 1970 | 1.1944 |
| 1969 | 1.20076 |
| 1968 | 1.21409 |
| 1967 | 1.23245 |
| 1966 | 1.24524 |
| 1965 | 1.24398 |
| 1964 | 1.22904 |
| 1963 | 1.19955 |
| 1962 | 1.15673 |
| 1961 | 1.11295 |
| 1960 | 1.07939 |