| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 0.535729 |
| 2021 | 0.549518 |
| 2020 | 0.55958 |
| 2019 | 0.563978 |
| 2018 | 0.56433 |
| 2017 | 0.563674 |
| 2016 | 0.562439 |
| 2015 | 0.560398 |
| 2014 | 0.557276 |
| 2013 | 0.553756 |
| 2012 | 0.550464 |
| 2011 | 0.548103 |
| 2010 | 0.544771 |
| 2009 | 0.538957 |
| 2008 | 0.532295 |
| 2007 | 0.524955 |
| 2006 | 0.517255 |
| 2005 | 0.509758 |
| 2004 | 0.502539 |
| 2003 | 0.497234 |
| 2002 | 0.493375 |
| 2001 | 0.488891 |
| 2000 | 0.484101 |
| 1999 | 0.479512 |
| 1998 | 0.474422 |
| 1997 | 0.468263 |
| 1996 | 0.463119 |
| 1995 | 0.459976 |
| 1994 | 0.457617 |
| 1993 | 0.455685 |
| 1992 | 0.452102 |
| 1991 | 0.446991 |
| 1990 | 0.442663 |
| 1989 | 0.436886 |
| 1988 | 0.426028 |
| 1987 | 0.413147 |
| 1986 | 0.399314 |
| 1985 | 0.385597 |
| 1984 | 0.371876 |
| 1983 | 0.378925 |
| 1982 | 0.390127 |
| 1981 | 0.386765 |
| 1980 | 0.39044 |
| 1979 | 0.400314 |
| 1978 | 0.414825 |
| 1977 | 0.432787 |
| 1976 | 0.453552 |
| 1975 | 0.477223 |
| 1974 | 0.488187 |
| 1973 | 0.484898 |
| 1972 | 0.482115 |
| 1971 | 0.478631 |
| 1970 | 0.474511 |
| 1969 | 0.470438 |
| 1968 | 0.46586 |
| 1967 | 0.460651 |
| 1966 | 0.455588 |
| 1965 | 0.451171 |
| 1964 | 0.447203 |
| 1963 | 0.443605 |
| 1962 | 0.442543 |
| 1961 | 0.443602 |
| 1960 | 0.444045 |