| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 2.52446 |
| 2021 | 2.72621 |
| 2020 | 2.818 |
| 2019 | 2.79084 |
| 2018 | 2.77435 |
| 2017 | 2.72566 |
| 2016 | 2.64513 |
| 2015 | 2.55769 |
| 2014 | 2.48806 |
| 2013 | 2.43131 |
| 2012 | 2.36411 |
| 2011 | 2.27866 |
| 2010 | 2.17169 |
| 2009 | 2.04766 |
| 2008 | 1.90717 |
| 2007 | 1.75022 |
| 2006 | 1.58701 |
| 2005 | 1.43038 |
| 2004 | 1.28202 |
| 2003 | 1.14762 |
| 2002 | 1.04245 |
| 2001 | 0.965508 |
| 2000 | 0.904247 |
| 1999 | 0.855455 |
| 1998 | 0.824305 |
| 1997 | 0.803821 |
| 1996 | 0.786328 |
| 1995 | 0.7727 |
| 1994 | 0.759543 |
| 1993 | 0.751138 |
| 1992 | 0.749592 |
| 1991 | 0.747778 |
| 1990 | 0.746277 |
| 1989 | 0.745616 |
| 1988 | 0.748423 |
| 1987 | 0.756222 |
| 1986 | 0.764242 |
| 1985 | 0.766182 |
| 1984 | 0.759614 |
| 1983 | 0.742124 |
| 1982 | 0.714614 |
| 1981 | 0.688416 |
| 1980 | 0.671507 |
| 1979 | 0.663444 |
| 1978 | 0.665118 |
| 1977 | 0.677003 |
| 1976 | 0.691035 |
| 1975 | 0.701746 |
| 1974 | 0.710923 |
| 1973 | 0.718579 |
| 1972 | 0.725609 |
| 1971 | 0.733189 |
| 1970 | 0.741699 |
| 1969 | 0.750799 |
| 1968 | 0.759681 |
| 1967 | 0.769171 |
| 1966 | 0.776594 |
| 1965 | 0.779406 |
| 1964 | 0.778435 |
| 1963 | 0.773255 |
| 1962 | 0.763617 |
| 1961 | 0.752666 |
| 1960 | 0.745356 |