| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 5.70396 |
| 2021 | 5.6619 |
| 2020 | 5.5152 |
| 2019 | 5.31911 |
| 2018 | 4.95849 |
| 2017 | 4.40411 |
| 2016 | 3.8968 |
| 2015 | 3.65809 |
| 2014 | 3.61811 |
| 2013 | 3.68577 |
| 2012 | 3.93523 |
| 2011 | 4.32641 |
| 2010 | 4.56853 |
| 2009 | 4.63949 |
| 2008 | 4.73151 |
| 2007 | 4.80692 |
| 2006 | 4.86151 |
| 2005 | 4.92127 |
| 2004 | 4.99384 |
| 2003 | 5.05642 |
| 2002 | 5.09055 |
| 2001 | 5.08182 |
| 2000 | 5.0187 |
| 1999 | 4.90777 |
| 1998 | 4.75563 |
| 1997 | 4.57056 |
| 1996 | 4.38405 |
| 1995 | 4.21636 |
| 1994 | 4.06166 |
| 1993 | 3.91042 |
| 1992 | 3.77679 |
| 1991 | 3.66594 |
| 1990 | 3.56305 |
| 1989 | 3.46238 |
| 1988 | 3.3688 |
| 1987 | 3.28063 |
| 1986 | 3.18413 |
| 1985 | 3.08312 |
| 1984 | 2.98211 |
| 1983 | 2.88065 |
| 1982 | 2.77419 |
| 1981 | 2.66021 |
| 1980 | 2.5349 |
| 1979 | 2.40114 |
| 1978 | 2.2685 |
| 1977 | 2.15025 |
| 1976 | 2.05902 |
| 1975 | 2.00455 |
| 1974 | 1.98473 |
| 1973 | 1.98829 |
| 1972 | 2.01063 |
| 1971 | 2.03916 |
| 1970 | 2.06561 |
| 1969 | 2.09044 |
| 1968 | 2.11311 |
| 1967 | 2.13394 |
| 1966 | 2.15148 |
| 1965 | 2.16402 |
| 1964 | 2.17272 |
| 1963 | 2.17618 |
| 1962 | 2.17493 |
| 1961 | 2.17398 |
| 1960 | 2.18205 |