| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 3.01357 |
| 2021 | 2.98375 |
| 2020 | 2.94533 |
| 2019 | 2.84541 |
| 2018 | 2.80691 |
| 2017 | 2.78315 |
| 2016 | 2.87997 |
| 2015 | 2.88808 |
| 2014 | 2.89616 |
| 2013 | 3.0064 |
| 2012 | 4.34426 |
| 2011 | 4.72315 |
| 2010 | 3.67227 |
| 2009 | 3.90759 |
| 2008 | 4.814 |
| 2007 | 5.74795 |
| 2006 | 6.37378 |
| 2005 | 5.25659 |
| 2004 | 1.95866 |
| 2003 | 1.56093 |
| 2002 | 3.38052 |
| 2001 | 3.70989 |
| 2000 | 4.48807 |
| 1999 | 6.32694 |
| 1998 | 10.9866 |
| 1997 | 8.61098 |
| 1996 | -3.90872 |
| 1995 | -5.5589 |
| 1994 | -6.35418 |
| 1993 | -1.79593 |
| 1992 | 0.406107 |
| 1991 | -8.51101 |
| 1990 | -7.82552 |
| 1989 | 7.83369 |
| 1988 | 8.17035 |
| 1987 | 8.49246 |
| 1986 | 8.82738 |
| 1985 | 9.14854 |
| 1984 | 7.24146 |
| 1983 | 5.67118 |
| 1982 | 5.6236 |
| 1981 | 5.72644 |
| 1980 | 5.81715 |
| 1979 | 5.84492 |
| 1978 | 5.86498 |
| 1977 | 5.807 |
| 1976 | 5.77607 |
| 1975 | 5.79796 |
| 1974 | 5.77973 |
| 1973 | 5.75433 |
| 1972 | 5.71229 |
| 1971 | 5.72764 |
| 1970 | 5.80215 |
| 1969 | 5.81286 |
| 1968 | 5.83261 |
| 1967 | 5.83713 |
| 1966 | 5.85838 |
| 1965 | 5.88448 |
| 1964 | 5.90006 |
| 1963 | 5.90922 |
| 1962 | 5.91984 |
| 1961 | 5.90654 |
| 1960 | - |