| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 1.71899 |
| 2021 | 1.69915 |
| 2020 | 1.68235 |
| 2019 | 1.66483 |
| 2018 | 1.64718 |
| 2017 | 1.63241 |
| 2016 | 1.62035 |
| 2015 | 1.61119 |
| 2014 | 1.59238 |
| 2013 | 1.58033 |
| 2012 | 1.59373 |
| 2011 | 1.62815 |
| 2010 | 1.68115 |
| 2009 | 1.75774 |
| 2008 | 1.83839 |
| 2007 | 1.89632 |
| 2006 | 1.94219 |
| 2005 | 1.977 |
| 2004 | 2.00473 |
| 2003 | 2.02634 |
| 2002 | 2.04253 |
| 2001 | 2.05513 |
| 2000 | 2.06438 |
| 1999 | 2.07004 |
| 1998 | 2.07373 |
| 1997 | 2.07797 |
| 1996 | 2.07915 |
| 1995 | 2.07373 |
| 1994 | 2.06353 |
| 1993 | 2.04873 |
| 1992 | 2.02908 |
| 1991 | 2.00736 |
| 1990 | 1.98849 |
| 1989 | 1.97667 |
| 1988 | 1.96689 |
| 1987 | 1.96075 |
| 1986 | 1.95471 |
| 1985 | 1.94798 |
| 1984 | 1.94096 |
| 1983 | 1.94521 |
| 1982 | 1.95034 |
| 1981 | 1.94831 |
| 1980 | 1.95557 |
| 1979 | 1.97033 |
| 1978 | 1.99113 |
| 1977 | 2.01667 |
| 1976 | 2.04263 |
| 1975 | 2.06702 |
| 1974 | 2.07981 |
| 1973 | 2.07857 |
| 1972 | 2.0727 |
| 1971 | 2.06452 |
| 1970 | 2.05748 |
| 1969 | 2.05259 |
| 1968 | 2.04939 |
| 1967 | 2.04732 |
| 1966 | 2.04317 |
| 1965 | 2.03585 |
| 1964 | 2.02591 |
| 1963 | 2.0129 |
| 1962 | 1.99924 |
| 1961 | 1.98781 |
| 1960 | 1.979 |