| 年份 | 也门共和国 |
|---|---|
| 2023 | - |
| 2022 | 2.06998 |
| 2021 | 2.0281 |
| 2020 | 1.99129 |
| 2019 | 1.95764 |
| 2018 | 1.92731 |
| 2017 | 1.90017 |
| 2016 | 1.87437 |
| 2015 | 1.85159 |
| 2014 | 1.83328 |
| 2013 | 1.81986 |
| 2012 | 1.81108 |
| 2011 | 1.80608 |
| 2010 | 1.80429 |
| 2009 | 1.81293 |
| 2008 | 1.8364 |
| 2007 | 1.87636 |
| 2006 | 1.92829 |
| 2005 | 1.97753 |
| 2004 | 2.01176 |
| 2003 | 2.02809 |
| 2002 | 2.02697 |
| 2001 | 2.01616 |
| 2000 | 2.01314 |
| 1999 | 2.01897 |
| 1998 | 2.03 |
| 1997 | 2.04465 |
| 1996 | 2.0578 |
| 1995 | 2.0687 |
| 1994 | 2.08182 |
| 1993 | 2.0965 |
| 1992 | 2.11101 |
| 1991 | 2.12823 |
| 1990 | 2.14997 |
| 1989 | 2.17442 |
| 1988 | 2.19953 |
| 1987 | 2.22633 |
| 1986 | 2.25569 |
| 1985 | 2.287 |
| 1984 | 2.3189 |
| 1983 | 2.35069 |
| 1982 | 2.38228 |
| 1981 | 2.41307 |
| 1980 | 2.44271 |
| 1979 | 2.47119 |
| 1978 | 2.49784 |
| 1977 | 2.52271 |
| 1976 | 2.54603 |
| 1975 | 2.5676 |
| 1974 | 2.58733 |
| 1973 | 2.60512 |
| 1972 | 2.62169 |
| 1971 | 2.63732 |
| 1970 | 2.65192 |
| 1969 | 2.66538 |
| 1968 | 2.67846 |
| 1967 | 2.69141 |
| 1966 | 2.70316 |
| 1965 | 2.71325 |
| 1964 | 2.72201 |
| 1963 | 2.7295 |
| 1962 | 2.73603 |
| 1961 | 2.74301 |
| 1960 | 2.75131 |