| 年份 | 也门共和国 |
|---|---|
| 2023 | - |
| 2022 | 4.75299 |
| 2021 | 4.59426 |
| 2020 | 4.44334 |
| 2019 | 4.29858 |
| 2018 | 4.17026 |
| 2017 | 4.06082 |
| 2016 | 3.9623 |
| 2015 | 3.87438 |
| 2014 | 3.79532 |
| 2013 | 3.72364 |
| 2012 | 3.65512 |
| 2011 | 3.5875 |
| 2010 | 3.52027 |
| 2009 | 3.45438 |
| 2008 | 3.38828 |
| 2007 | 3.32144 |
| 2006 | 3.26069 |
| 2005 | 3.21011 |
| 2004 | 3.17032 |
| 2003 | 3.13961 |
| 2002 | 3.11245 |
| 2001 | 3.08624 |
| 2000 | 3.06452 |
| 1999 | 3.05051 |
| 1998 | 3.04438 |
| 1997 | 3.0459 |
| 1996 | 3.05414 |
| 1995 | 3.06886 |
| 1994 | 3.10583 |
| 1993 | 3.1715 |
| 1992 | 3.26646 |
| 1991 | 3.38592 |
| 1990 | 3.50801 |
| 1989 | 3.60623 |
| 1988 | 3.6753 |
| 1987 | 3.71974 |
| 1986 | 3.75063 |
| 1985 | 3.79266 |
| 1984 | 3.84352 |
| 1983 | 3.90195 |
| 1982 | 3.965 |
| 1981 | 4.02232 |
| 1980 | 4.06917 |
| 1979 | 4.11069 |
| 1978 | 4.14707 |
| 1977 | 4.17742 |
| 1976 | 4.20844 |
| 1975 | 4.24257 |
| 1974 | 4.27627 |
| 1973 | 4.30638 |
| 1972 | 4.33568 |
| 1971 | 4.36621 |
| 1970 | 4.39832 |
| 1969 | 4.43028 |
| 1968 | 4.46076 |
| 1967 | 4.48983 |
| 1966 | 4.51603 |
| 1965 | 4.53866 |
| 1964 | 4.55829 |
| 1963 | 4.57521 |
| 1962 | 4.58928 |
| 1961 | 4.60053 |
| 1960 | 4.60918 |