| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 0.718056 |
| 2021 | 0.726044 |
| 2020 | 0.728249 |
| 2019 | 0.723967 |
| 2018 | 0.714716 |
| 2017 | 0.703237 |
| 2016 | 0.690362 |
| 2015 | 0.676628 |
| 2014 | 0.661973 |
| 2013 | 0.645966 |
| 2012 | 0.629753 |
| 2011 | 0.617856 |
| 2010 | 0.606849 |
| 2009 | 0.592965 |
| 2008 | 0.580455 |
| 2007 | 0.56868 |
| 2006 | 0.556598 |
| 2005 | 0.544402 |
| 2004 | 0.532181 |
| 2003 | 0.521476 |
| 2002 | 0.511452 |
| 2001 | 0.50055 |
| 2000 | 0.489419 |
| 1999 | 0.477878 |
| 1998 | 0.465318 |
| 1997 | 0.45215 |
| 1996 | 0.440076 |
| 1995 | 0.43119 |
| 1994 | 0.424298 |
| 1993 | 0.419686 |
| 1992 | 0.414887 |
| 1991 | 0.409489 |
| 1990 | 0.40244 |
| 1989 | 0.395207 |
| 1988 | 0.385971 |
| 1987 | 0.375077 |
| 1986 | 0.363553 |
| 1985 | 0.352753 |
| 1984 | 0.342522 |
| 1983 | 0.347332 |
| 1982 | 0.355724 |
| 1981 | 0.354277 |
| 1980 | 0.358135 |
| 1979 | 0.367344 |
| 1978 | 0.381232 |
| 1977 | 0.398457 |
| 1976 | 0.41769 |
| 1975 | 0.438705 |
| 1974 | 0.450361 |
| 1973 | 0.450576 |
| 1972 | 0.450064 |
| 1971 | 0.449209 |
| 1970 | 0.448671 |
| 1969 | 0.447999 |
| 1968 | 0.446457 |
| 1967 | 0.444828 |
| 1966 | 0.443705 |
| 1965 | 0.443349 |
| 1964 | 0.44367 |
| 1963 | 0.444858 |
| 1962 | 0.448381 |
| 1961 | 0.45352 |
| 1960 | 0.4582 |