| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 78.0335 |
| 2021 | 79.7056 |
| 2020 | 81.2637 |
| 2019 | 82.5719 |
| 2018 | 83.5356 |
| 2017 | 84.2895 |
| 2016 | 84.8799 |
| 2015 | 85.4593 |
| 2014 | 85.9089 |
| 2013 | 85.9921 |
| 2012 | 85.69 |
| 2011 | 86.6977 |
| 2010 | 88.0628 |
| 2009 | 87.9207 |
| 2008 | 87.7781 |
| 2007 | 87.4487 |
| 2006 | 86.7356 |
| 2005 | 86.007 |
| 2004 | 85.3183 |
| 2003 | 84.7157 |
| 2002 | 84.2156 |
| 2001 | 83.8164 |
| 2000 | 83.5064 |
| 1999 | 83.2414 |
| 1998 | 83.2292 |
| 1997 | 83.4024 |
| 1996 | 83.6761 |
| 1995 | 84.1829 |
| 1994 | 84.9434 |
| 1993 | 85.8156 |
| 1992 | 86.6517 |
| 1991 | 87.4359 |
| 1990 | 88.0265 |
| 1989 | 88.6314 |
| 1988 | 89.4867 |
| 1987 | 90.1795 |
| 1986 | 90.6916 |
| 1985 | 91.106 |
| 1984 | 91.5167 |
| 1983 | 91.5237 |
| 1982 | 91.1125 |
| 1981 | 90.6242 |
| 1980 | 89.9621 |
| 1979 | 89.165 |
| 1978 | 88.3123 |
| 1977 | 87.4441 |
| 1976 | 86.6335 |
| 1975 | 85.874 |
| 1974 | 85.2136 |
| 1973 | 84.6755 |
| 1972 | 84.1582 |
| 1971 | 83.6198 |
| 1970 | 83.0716 |
| 1969 | 82.4848 |
| 1968 | 81.8442 |
| 1967 | 81.2018 |
| 1966 | 80.519 |
| 1965 | 79.7949 |
| 1964 | 78.7667 |
| 1963 | 77.7701 |
| 1962 | 77.2436 |
| 1961 | 76.9829 |
| 1960 | 76.9387 |