| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 3.05398 |
| 2021 | 3.01872 |
| 2020 | 2.98656 |
| 2019 | 2.95034 |
| 2018 | 2.91208 |
| 2017 | 2.87615 |
| 2016 | 2.84027 |
| 2015 | 2.80461 |
| 2014 | 2.77025 |
| 2013 | 2.73828 |
| 2012 | 2.70966 |
| 2011 | 2.68496 |
| 2010 | 2.66419 |
| 2009 | 2.64837 |
| 2008 | 2.63818 |
| 2007 | 2.63289 |
| 2006 | 2.63183 |
| 2005 | 2.6347 |
| 2004 | 2.61643 |
| 2003 | 2.60668 |
| 2002 | 2.64006 |
| 2001 | 2.69784 |
| 2000 | 2.7814 |
| 1999 | 2.90949 |
| 1998 | 3.04106 |
| 1997 | 3.13229 |
| 1996 | 3.21071 |
| 1995 | 3.26781 |
| 1994 | 3.31283 |
| 1993 | 3.34603 |
| 1992 | 3.37344 |
| 1991 | 3.39727 |
| 1990 | 3.40909 |
| 1989 | 3.41242 |
| 1988 | 3.4191 |
| 1987 | 3.42468 |
| 1986 | 3.42616 |
| 1985 | 3.42218 |
| 1984 | 3.41198 |
| 1983 | 3.37847 |
| 1982 | 3.34015 |
| 1981 | 3.31985 |
| 1980 | 3.30299 |
| 1979 | 3.29188 |
| 1978 | 3.29008 |
| 1977 | 3.29561 |
| 1976 | 3.30515 |
| 1975 | 3.31249 |
| 1974 | 3.32438 |
| 1973 | 3.34029 |
| 1972 | 3.34854 |
| 1971 | 3.35489 |
| 1970 | 3.36599 |
| 1969 | 3.38132 |
| 1968 | 3.39878 |
| 1967 | 3.41764 |
| 1966 | 3.43253 |
| 1965 | 3.44047 |
| 1964 | 3.44181 |
| 1963 | 3.43505 |
| 1962 | 3.419 |
| 1961 | 3.40019 |
| 1960 | 3.38487 |