| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 12.6421 |
| 2021 | 12.7046 |
| 2020 | 12.7559 |
| 2019 | 12.7406 |
| 2018 | 12.6519 |
| 2017 | 12.5106 |
| 2016 | 12.3463 |
| 2015 | 12.2012 |
| 2014 | 12.0776 |
| 2013 | 11.9675 |
| 2012 | 11.8616 |
| 2011 | 11.8497 |
| 2010 | 11.838 |
| 2009 | 11.7114 |
| 2008 | 11.6008 |
| 2007 | 11.5072 |
| 2006 | 11.4181 |
| 2005 | 11.3534 |
| 2004 | 11.3176 |
| 2003 | 11.3177 |
| 2002 | 11.3539 |
| 2001 | 11.4285 |
| 2000 | 11.5338 |
| 1999 | 11.647 |
| 1998 | 11.8107 |
| 1997 | 11.9931 |
| 1996 | 12.1541 |
| 1995 | 12.3254 |
| 1994 | 12.5332 |
| 1993 | 12.6673 |
| 1992 | 12.7453 |
| 1991 | 12.8281 |
| 1990 | 12.8281 |
| 1989 | 12.779 |
| 1988 | 12.7049 |
| 1987 | 12.5945 |
| 1986 | 12.4603 |
| 1985 | 12.3095 |
| 1984 | 12.1674 |
| 1983 | 12.0993 |
| 1982 | 12.0484 |
| 1981 | 11.9631 |
| 1980 | 11.8857 |
| 1979 | 11.8048 |
| 1978 | 11.7293 |
| 1977 | 11.6903 |
| 1976 | 11.6689 |
| 1975 | 11.6638 |
| 1974 | 11.6563 |
| 1973 | 11.623 |
| 1972 | 11.5838 |
| 1971 | 11.5439 |
| 1970 | 11.5037 |
| 1969 | 11.4637 |
| 1968 | 11.4262 |
| 1967 | 11.3786 |
| 1966 | 11.3191 |
| 1965 | 11.2461 |
| 1964 | 11.0629 |
| 1963 | 10.8736 |
| 1962 | 10.8559 |
| 1961 | 10.9557 |
| 1960 | 11.1324 |