| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 1.26514 |
| 2021 | 0.998323 |
| 2020 | 0.973406 |
| 2019 | 0.940305 |
| 2018 | 0.938216 |
| 2017 | 0.940009 |
| 2016 | 1.06264 |
| 2015 | 1.0515 |
| 2014 | 1.03253 |
| 2013 | 1.08124 |
| 2012 | 1.18203 |
| 2011 | 1.05878 |
| 2010 | 0.816739 |
| 2009 | 0.65175 |
| 2008 | 0.497952 |
| 2007 | 0.311075 |
| 2006 | 0.476174 |
| 2005 | 0.856442 |
| 2004 | 0.634352 |
| 2003 | - |
| 2002 | - |
| 2001 | - |
| 2000 | - |
| 1999 | - |
| 1998 | - |
| 1997 | - |
| 1996 | - |
| 1995 | - |
| 1994 | 29.7277 |
| 1993 | 18.9838 |
| 1992 | 10.1342 |
| 1991 | 7.18391 |
| 1990 | - |
| 1989 | - |
| 1988 | 2.40778 |
| 1987 | 2.28721 |
| 1986 | 2.89536 |
| 1985 | 2.95431 |
| 1984 | 2.94048 |
| 1983 | 4.7061 |
| 1982 | 5.01794 |
| 1981 | 3.11282 |
| 1980 | 1.49175 |
| 1979 | 1.15465 |
| 1978 | 1.24094 |
| 1977 | 1.15156 |
| 1976 | 1.07257 |
| 1975 | 0.952381 |
| 1974 | 0.934292 |
| 1973 | 0.968992 |
| 1972 | 1.10024 |
| 1971 | 1.18594 |
| 1970 | 1.09873 |
| 1969 | 0.993485 |
| 1968 | 1.10188 |
| 1967 | 1.16858 |
| 1966 | 1.14519 |
| 1965 | 1.1775 |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |