| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 2.44076 |
| 2021 | 2.38757 |
| 2020 | 2.34485 |
| 2019 | 2.31323 |
| 2018 | 2.29382 |
| 2017 | 2.28654 |
| 2016 | 2.29008 |
| 2015 | 2.30377 |
| 2014 | 2.32504 |
| 2013 | 2.35176 |
| 2012 | 2.38128 |
| 2011 | 2.42408 |
| 2010 | 2.47079 |
| 2009 | 2.48343 |
| 2008 | 2.4939 |
| 2007 | 2.53397 |
| 2006 | 2.58816 |
| 2005 | 2.65093 |
| 2004 | 2.74712 |
| 2003 | 2.84828 |
| 2002 | 2.90656 |
| 2001 | 2.93978 |
| 2000 | 2.95457 |
| 1999 | 2.95675 |
| 1998 | 2.94873 |
| 1997 | 2.93691 |
| 1996 | 2.91288 |
| 1995 | 2.87506 |
| 1994 | 2.82656 |
| 1993 | 2.77344 |
| 1992 | 2.72278 |
| 1991 | 2.67403 |
| 1990 | 2.61577 |
| 1989 | 2.57394 |
| 1988 | 2.54228 |
| 1987 | 2.51415 |
| 1986 | 2.48831 |
| 1985 | 2.46429 |
| 1984 | 2.44183 |
| 1983 | 2.43359 |
| 1982 | 2.43078 |
| 1981 | 2.41852 |
| 1980 | 2.4064 |
| 1979 | 2.39383 |
| 1978 | 2.37686 |
| 1977 | 2.35881 |
| 1976 | 2.34429 |
| 1975 | 2.33805 |
| 1974 | 2.33669 |
| 1973 | 2.33787 |
| 1972 | 2.34495 |
| 1971 | 2.35079 |
| 1970 | 2.35113 |
| 1969 | 2.34752 |
| 1968 | 2.34017 |
| 1967 | 2.32879 |
| 1966 | 2.31797 |
| 1965 | 2.31117 |
| 1964 | 2.30749 |
| 1963 | 2.30662 |
| 1962 | 2.31044 |
| 1961 | 2.31814 |
| 1960 | 2.32819 |