| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 9.35022 |
| 2021 | 9.1689 |
| 2020 | 8.97869 |
| 2019 | 8.79791 |
| 2018 | 8.65021 |
| 2017 | 8.54239 |
| 2016 | 8.48036 |
| 2015 | 8.44988 |
| 2014 | 8.46376 |
| 2013 | 8.53348 |
| 2012 | 8.64437 |
| 2011 | 8.64234 |
| 2010 | 8.61006 |
| 2009 | 8.70005 |
| 2008 | 8.8102 |
| 2007 | 8.93951 |
| 2006 | 9.07043 |
| 2005 | 9.20308 |
| 2004 | 9.34786 |
| 2003 | 9.44465 |
| 2002 | 9.49449 |
| 2001 | 9.52882 |
| 2000 | 9.51962 |
| 1999 | 9.46127 |
| 1998 | 9.36018 |
| 1997 | 9.24321 |
| 1996 | 9.10786 |
| 1995 | 8.96617 |
| 1994 | 8.8444 |
| 1993 | 8.76081 |
| 1992 | 8.68903 |
| 1991 | 8.62836 |
| 1990 | 8.63972 |
| 1989 | 8.61295 |
| 1988 | 8.49666 |
| 1987 | 8.38122 |
| 1986 | 8.26689 |
| 1985 | 8.14968 |
| 1984 | 8.02831 |
| 1983 | 7.97363 |
| 1982 | 7.96044 |
| 1981 | 7.92698 |
| 1980 | 7.91668 |
| 1979 | 7.92489 |
| 1978 | 7.94256 |
| 1977 | 7.96647 |
| 1976 | 7.97877 |
| 1975 | 7.9818 |
| 1974 | 7.90813 |
| 1973 | 7.83503 |
| 1972 | 7.88031 |
| 1971 | 8.00312 |
| 1970 | 8.19278 |
| 1969 | 8.48809 |
| 1968 | 8.77994 |
| 1967 | 8.95258 |
| 1966 | 9.06553 |
| 1965 | 9.12312 |
| 1964 | 9.14679 |
| 1963 | 9.14883 |
| 1962 | 9.14102 |
| 1961 | 9.13231 |
| 1960 | 9.11698 |