| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 0.479793 |
| 2021 | 0.472214 |
| 2020 | 0.463415 |
| 2019 | 0.450686 |
| 2018 | 0.436187 |
| 2017 | 0.422423 |
| 2016 | 0.409828 |
| 2015 | 0.398138 |
| 2014 | 0.387682 |
| 2013 | 0.379301 |
| 2012 | 0.373125 |
| 2011 | 0.36267 |
| 2010 | 0.349788 |
| 2009 | 0.340899 |
| 2008 | 0.331387 |
| 2007 | 0.321908 |
| 2006 | 0.313413 |
| 2005 | 0.305203 |
| 2004 | 0.297091 |
| 2003 | 0.289326 |
| 2002 | 0.28164 |
| 2001 | 0.27376 |
| 2000 | 0.266508 |
| 1999 | 0.259917 |
| 1998 | 0.254122 |
| 1997 | 0.249033 |
| 1996 | 0.244288 |
| 1995 | 0.239933 |
| 1994 | 0.235242 |
| 1993 | 0.230122 |
| 1992 | 0.223696 |
| 1991 | 0.216533 |
| 1990 | 0.208669 |
| 1989 | 0.202066 |
| 1988 | 0.194882 |
| 1987 | 0.188252 |
| 1986 | 0.181949 |
| 1985 | 0.175732 |
| 1984 | 0.169222 |
| 1983 | 0.17603 |
| 1982 | 0.186566 |
| 1981 | 0.18869 |
| 1980 | 0.195299 |
| 1979 | 0.205944 |
| 1978 | 0.219759 |
| 1977 | 0.236278 |
| 1976 | 0.255193 |
| 1975 | 0.276874 |
| 1974 | 0.287665 |
| 1973 | 0.284816 |
| 1972 | 0.281528 |
| 1971 | 0.278525 |
| 1970 | 0.276286 |
| 1969 | 0.274456 |
| 1968 | 0.273086 |
| 1967 | 0.272039 |
| 1966 | 0.270379 |
| 1965 | 0.267463 |
| 1964 | 0.263039 |
| 1963 | 0.256143 |
| 1962 | 0.252775 |
| 1961 | 0.25488 |
| 1960 | 0.257287 |