| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 5.52154 |
| 2021 | 5.48544 |
| 2020 | 5.34854 |
| 2019 | 5.16005 |
| 2018 | 4.80702 |
| 2017 | 4.25998 |
| 2016 | 3.75385 |
| 2015 | 3.48916 |
| 2014 | 3.38668 |
| 2013 | 3.37649 |
| 2012 | 3.55023 |
| 2011 | 3.8705 |
| 2010 | 4.05683 |
| 2009 | 4.10173 |
| 2008 | 4.18379 |
| 2007 | 4.23946 |
| 2006 | 4.26058 |
| 2005 | 4.27816 |
| 2004 | 4.30244 |
| 2003 | 4.31532 |
| 2002 | 4.29849 |
| 2001 | 4.23589 |
| 2000 | 4.11476 |
| 1999 | 3.94048 |
| 1998 | 3.70478 |
| 1997 | 3.4179 |
| 1996 | 3.11795 |
| 1995 | 2.83207 |
| 1994 | 2.5597 |
| 1993 | 2.30522 |
| 1992 | 2.09521 |
| 1991 | 1.93288 |
| 1990 | 1.8034 |
| 1989 | 1.70046 |
| 1988 | 1.6332 |
| 1987 | 1.58955 |
| 1986 | 1.55578 |
| 1985 | 1.53307 |
| 1984 | 1.52113 |
| 1983 | 1.51513 |
| 1982 | 1.51011 |
| 1981 | 1.50474 |
| 1980 | 1.50099 |
| 1979 | 1.4999 |
| 1978 | 1.5062 |
| 1977 | 1.52142 |
| 1976 | 1.53539 |
| 1975 | 1.53782 |
| 1974 | 1.52589 |
| 1973 | 1.49583 |
| 1972 | 1.4527 |
| 1971 | 1.41718 |
| 1970 | 1.40272 |
| 1969 | 1.40877 |
| 1968 | 1.43632 |
| 1967 | 1.48736 |
| 1966 | 1.54198 |
| 1965 | 1.58353 |
| 1964 | 1.6173 |
| 1963 | 1.64561 |
| 1962 | 1.66556 |
| 1961 | 1.67938 |
| 1960 | 1.69459 |