| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 2.05364 |
| 2021 | 1.98371 |
| 2020 | 1.90548 |
| 2019 | 1.82966 |
| 2018 | 1.74941 |
| 2017 | 1.65568 |
| 2016 | 1.54357 |
| 2015 | 1.41228 |
| 2014 | 1.27921 |
| 2013 | 1.14721 |
| 2012 | 1.01064 |
| 2011 | 0.882834 |
| 2010 | 0.771613 |
| 2009 | 0.678422 |
| 2008 | 0.603711 |
| 2007 | 0.546224 |
| 2006 | 0.501404 |
| 2005 | 0.464398 |
| 2004 | 0.433609 |
| 2003 | 0.412517 |
| 2002 | 0.399947 |
| 2001 | 0.391484 |
| 2000 | 0.384847 |
| 1999 | 0.380291 |
| 1998 | 0.377161 |
| 1997 | 0.374527 |
| 1996 | 0.371855 |
| 1995 | 0.369083 |
| 1994 | 0.363461 |
| 1993 | 0.361155 |
| 1992 | 0.366209 |
| 1991 | 0.371812 |
| 1990 | 0.374921 |
| 1989 | 0.374083 |
| 1988 | 0.3675 |
| 1987 | 0.355312 |
| 1986 | 0.342946 |
| 1985 | 0.334562 |
| 1984 | 0.330459 |
| 1983 | 0.331583 |
| 1982 | 0.338538 |
| 1981 | 0.3469 |
| 1980 | 0.352961 |
| 1979 | 0.357299 |
| 1978 | 0.359747 |
| 1977 | 0.359998 |
| 1976 | 0.359569 |
| 1975 | 0.360167 |
| 1974 | 0.361592 |
| 1973 | 0.363294 |
| 1972 | 0.366079 |
| 1971 | 0.36901 |
| 1970 | 0.370963 |
| 1969 | 0.37183 |
| 1968 | 0.370826 |
| 1967 | 0.368438 |
| 1966 | 0.365674 |
| 1965 | 0.363398 |
| 1964 | 0.3625 |
| 1963 | 0.364296 |
| 1962 | 0.368053 |
| 1961 | 0.369135 |
| 1960 | 0.364657 |