| 年份 | 朝鲜民主主义人民共和国 |
|---|---|
| 2023 | - |
| 2022 | 6.4512 |
| 2021 | 6.40543 |
| 2020 | 6.45426 |
| 2019 | 6.61486 |
| 2018 | 6.89021 |
| 2017 | 7.37881 |
| 2016 | 7.95885 |
| 2015 | 8.46235 |
| 2014 | 8.90302 |
| 2013 | 9.24403 |
| 2012 | 9.40672 |
| 2011 | 9.39318 |
| 2010 | 9.23434 |
| 2009 | 8.97251 |
| 2008 | 8.68673 |
| 2007 | 8.30302 |
| 2006 | 7.86914 |
| 2005 | 7.57026 |
| 2004 | 7.36083 |
| 2003 | 7.25271 |
| 2002 | 7.28606 |
| 2001 | 7.26402 |
| 2000 | 7.11081 |
| 1999 | 6.89762 |
| 1998 | 6.47174 |
| 1997 | 5.78888 |
| 1996 | 5.1577 |
| 1995 | 4.87471 |
| 1994 | 4.83842 |
| 1993 | 4.93319 |
| 1992 | 5.29195 |
| 1991 | 5.86701 |
| 1990 | 6.25402 |
| 1989 | 6.42609 |
| 1988 | 6.63586 |
| 1987 | 6.80027 |
| 1986 | 6.91432 |
| 1985 | 7.02374 |
| 1984 | 7.14108 |
| 1983 | 7.23802 |
| 1982 | 7.2722 |
| 1981 | 7.21021 |
| 1980 | 7.03831 |
| 1979 | 6.76682 |
| 1978 | 6.38112 |
| 1977 | 5.89926 |
| 1976 | 5.39094 |
| 1975 | 4.90937 |
| 1974 | 4.46181 |
| 1973 | 4.05868 |
| 1972 | 3.74531 |
| 1971 | 3.51764 |
| 1970 | 3.34431 |
| 1969 | 3.21829 |
| 1968 | 3.15554 |
| 1967 | 3.13818 |
| 1966 | 3.13694 |
| 1965 | 3.14944 |
| 1964 | 3.18107 |
| 1963 | 3.22578 |
| 1962 | 3.26968 |
| 1961 | 3.30564 |
| 1960 | 3.34762 |