| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 3.01493 |
| 2021 | 3.02661 |
| 2020 | 3.04508 |
| 2019 | 3.07299 |
| 2018 | 3.09464 |
| 2017 | 3.09431 |
| 2016 | 3.06216 |
| 2015 | 2.99408 |
| 2014 | 2.89731 |
| 2013 | 2.77736 |
| 2012 | 2.63913 |
| 2011 | 2.50117 |
| 2010 | 2.37496 |
| 2009 | 2.26081 |
| 2008 | 2.15637 |
| 2007 | 2.06421 |
| 2006 | 1.98289 |
| 2005 | 1.90624 |
| 2004 | 1.83191 |
| 2003 | 1.76266 |
| 2002 | 1.70615 |
| 2001 | 1.65509 |
| 2000 | 1.60274 |
| 1999 | 1.55146 |
| 1998 | 1.50025 |
| 1997 | 1.44632 |
| 1996 | 1.3889 |
| 1995 | 1.32593 |
| 1994 | 1.25109 |
| 1993 | 1.16698 |
| 1992 | 1.08945 |
| 1991 | 1.02709 |
| 1990 | 0.983017 |
| 1989 | 0.955865 |
| 1988 | 0.939476 |
| 1987 | 0.929607 |
| 1986 | 0.921039 |
| 1985 | 0.911487 |
| 1984 | 0.900482 |
| 1983 | 0.887969 |
| 1982 | 0.873713 |
| 1981 | 0.85888 |
| 1980 | 0.844237 |
| 1979 | 0.829122 |
| 1978 | 0.812155 |
| 1977 | 0.794282 |
| 1976 | 0.778323 |
| 1975 | 0.766309 |
| 1974 | 0.758666 |
| 1973 | 0.756378 |
| 1972 | 0.759168 |
| 1971 | 0.760916 |
| 1970 | 0.756319 |
| 1969 | 0.744925 |
| 1968 | 0.725001 |
| 1967 | 0.698035 |
| 1966 | 0.670941 |
| 1965 | 0.648245 |
| 1964 | 0.630295 |
| 1963 | 0.619264 |
| 1962 | 0.613955 |
| 1961 | 0.604632 |
| 1960 | 0.586218 |