| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 3.48065 |
| 2021 | 3.37375 |
| 2020 | 3.25272 |
| 2019 | 3.11416 |
| 2018 | 2.95938 |
| 2017 | 2.79486 |
| 2016 | 2.63223 |
| 2015 | 2.4791 |
| 2014 | 2.35182 |
| 2013 | 2.24656 |
| 2012 | 2.14734 |
| 2011 | 2.05059 |
| 2010 | 1.95242 |
| 2009 | 1.85371 |
| 2008 | 1.77039 |
| 2007 | 1.70288 |
| 2006 | 1.63383 |
| 2005 | 1.56436 |
| 2004 | 1.496 |
| 2003 | 1.42844 |
| 2002 | 1.36885 |
| 2001 | 1.3178 |
| 2000 | 1.26778 |
| 1999 | 1.21836 |
| 1998 | 1.16835 |
| 1997 | 1.11993 |
| 1996 | 1.07689 |
| 1995 | 1.04205 |
| 1994 | 1.00842 |
| 1993 | 0.968636 |
| 1992 | 0.93086 |
| 1991 | 0.898178 |
| 1990 | 0.86673 |
| 1989 | 0.835908 |
| 1988 | 0.805385 |
| 1987 | 0.775027 |
| 1986 | 0.745682 |
| 1985 | 0.718122 |
| 1984 | 0.691998 |
| 1983 | 0.666457 |
| 1982 | 0.641695 |
| 1981 | 0.618299 |
| 1980 | 0.59635 |
| 1979 | 0.575728 |
| 1978 | 0.556694 |
| 1977 | 0.538829 |
| 1976 | 0.520722 |
| 1975 | 0.501502 |
| 1974 | 0.480865 |
| 1973 | 0.458244 |
| 1972 | 0.434848 |
| 1971 | 0.412651 |
| 1970 | 0.392731 |
| 1969 | 0.375089 |
| 1968 | 0.36004 |
| 1967 | 0.347798 |
| 1966 | 0.334861 |
| 1965 | 0.318787 |
| 1964 | 0.299953 |
| 1963 | 0.277871 |
| 1962 | 0.253191 |
| 1961 | 0.22905 |
| 1960 | 0.208797 |