| 年份 | 也门共和国 |
|---|---|
| 2023 | - |
| 2022 | 2.58579 |
| 2021 | 2.52921 |
| 2020 | 2.47379 |
| 2019 | 2.41833 |
| 2018 | 2.36187 |
| 2017 | 2.3051 |
| 2016 | 2.25277 |
| 2015 | 2.20748 |
| 2014 | 2.16697 |
| 2013 | 2.13049 |
| 2012 | 2.09739 |
| 2011 | 2.06608 |
| 2010 | 2.03828 |
| 2009 | 2.01586 |
| 2008 | 1.99938 |
| 2007 | 1.98853 |
| 2006 | 1.9823 |
| 2005 | 1.97963 |
| 2004 | 1.99304 |
| 2003 | 2.02658 |
| 2002 | 2.07694 |
| 2001 | 2.14084 |
| 2000 | 2.20488 |
| 1999 | 2.25229 |
| 1998 | 2.27936 |
| 1997 | 2.29038 |
| 1996 | 2.29142 |
| 1995 | 2.30145 |
| 1994 | 2.32198 |
| 1993 | 2.3487 |
| 1992 | 2.37994 |
| 1991 | 2.4096 |
| 1990 | 2.43446 |
| 1989 | 2.45778 |
| 1988 | 2.48105 |
| 1987 | 2.50356 |
| 1986 | 2.53008 |
| 1985 | 2.56087 |
| 1984 | 2.59201 |
| 1983 | 2.62282 |
| 1982 | 2.65411 |
| 1981 | 2.6869 |
| 1980 | 2.72164 |
| 1979 | 2.7573 |
| 1978 | 2.7915 |
| 1977 | 2.82394 |
| 1976 | 2.85534 |
| 1975 | 2.88539 |
| 1974 | 2.91383 |
| 1973 | 2.94081 |
| 1972 | 2.96714 |
| 1971 | 2.99285 |
| 1970 | 3.01757 |
| 1969 | 3.04121 |
| 1968 | 3.0646 |
| 1967 | 3.08791 |
| 1966 | 3.1097 |
| 1965 | 3.12917 |
| 1964 | 3.14678 |
| 1963 | 3.16343 |
| 1962 | 3.17835 |
| 1961 | 3.18997 |
| 1960 | 3.198 |