| 年份 | 也门共和国 |
|---|---|
| 2023 | - |
| 2022 | 4.74964 |
| 2021 | 4.58538 |
| 2020 | 4.43262 |
| 2019 | 4.28991 |
| 2018 | 4.16593 |
| 2017 | 4.06277 |
| 2016 | 3.97269 |
| 2015 | 3.89446 |
| 2014 | 3.82713 |
| 2013 | 3.76914 |
| 2012 | 3.71464 |
| 2011 | 3.66112 |
| 2010 | 3.60842 |
| 2009 | 3.55693 |
| 2008 | 3.5041 |
| 2007 | 3.44923 |
| 2006 | 3.39948 |
| 2005 | 3.35826 |
| 2004 | 3.32543 |
| 2003 | 3.30023 |
| 2002 | 3.2778 |
| 2001 | 3.25524 |
| 2000 | 3.23641 |
| 1999 | 3.22464 |
| 1998 | 3.22021 |
| 1997 | 3.22319 |
| 1996 | 3.233 |
| 1995 | 3.25061 |
| 1994 | 3.28706 |
| 1993 | 3.34928 |
| 1992 | 3.443 |
| 1991 | 3.55968 |
| 1990 | 3.67432 |
| 1989 | 3.76715 |
| 1988 | 3.83268 |
| 1987 | 3.86905 |
| 1986 | 3.88854 |
| 1985 | 3.9213 |
| 1984 | 3.96792 |
| 1983 | 4.02321 |
| 1982 | 4.08361 |
| 1981 | 4.13747 |
| 1980 | 4.17912 |
| 1979 | 4.21377 |
| 1978 | 4.24195 |
| 1977 | 4.26324 |
| 1976 | 4.28527 |
| 1975 | 4.3115 |
| 1974 | 4.33836 |
| 1973 | 4.36225 |
| 1972 | 4.38566 |
| 1971 | 4.40999 |
| 1970 | 4.43494 |
| 1969 | 4.45924 |
| 1968 | 4.48161 |
| 1967 | 4.50213 |
| 1966 | 4.52057 |
| 1965 | 4.53618 |
| 1964 | 4.54902 |
| 1963 | 4.55891 |
| 1962 | 4.5663 |
| 1961 | 4.57202 |
| 1960 | 4.57511 |