| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 14.4206 |
| 2021 | 14.6136 |
| 2020 | 14.8191 |
| 2019 | 15.0425 |
| 2018 | 15.2949 |
| 2017 | 15.595 |
| 2016 | 15.8781 |
| 2015 | 16.1285 |
| 2014 | 16.369 |
| 2013 | 16.5624 |
| 2012 | 16.7042 |
| 2011 | 16.9997 |
| 2010 | 17.3515 |
| 2009 | 17.5083 |
| 2008 | 17.6118 |
| 2007 | 17.6571 |
| 2006 | 17.6472 |
| 2005 | 17.644 |
| 2004 | 17.6629 |
| 2003 | 17.6902 |
| 2002 | 17.6923 |
| 2001 | 17.6527 |
| 2000 | 17.5709 |
| 1999 | 17.4511 |
| 1998 | 17.3151 |
| 1997 | 17.1943 |
| 1996 | 17.0887 |
| 1995 | 17.0081 |
| 1994 | 16.9593 |
| 1993 | 16.955 |
| 1992 | 16.977 |
| 1991 | 17.0332 |
| 1990 | 17.0837 |
| 1989 | 17.1678 |
| 1988 | 17.3863 |
| 1987 | 17.6329 |
| 1986 | 17.8444 |
| 1985 | 18.0716 |
| 1984 | 18.332 |
| 1983 | 18.4711 |
| 1982 | 18.5271 |
| 1981 | 18.6013 |
| 1980 | 18.5989 |
| 1979 | 18.5106 |
| 1978 | 18.351 |
| 1977 | 18.1516 |
| 1976 | 17.9388 |
| 1975 | 17.7293 |
| 1974 | 17.5963 |
| 1973 | 17.5469 |
| 1972 | 17.5044 |
| 1971 | 17.4698 |
| 1970 | 17.4345 |
| 1969 | 17.3744 |
| 1968 | 17.2959 |
| 1967 | 17.2256 |
| 1966 | 17.1532 |
| 1965 | 17.0727 |
| 1964 | 16.9853 |
| 1963 | 16.8878 |
| 1962 | 16.7706 |
| 1961 | 16.636 |
| 1960 | 16.4942 |