| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 3.30828 |
| 2021 | 3.34093 |
| 2020 | 3.37517 |
| 2019 | 3.39556 |
| 2018 | 3.40544 |
| 2017 | 3.41692 |
| 2016 | 3.43034 |
| 2015 | 3.44747 |
| 2014 | 3.48167 |
| 2013 | 3.51524 |
| 2012 | 3.52845 |
| 2011 | 3.54234 |
| 2010 | 3.54622 |
| 2009 | 3.52897 |
| 2008 | 3.50695 |
| 2007 | 3.48153 |
| 2006 | 3.45104 |
| 2005 | 3.41518 |
| 2004 | 3.37247 |
| 2003 | 3.32797 |
| 2002 | 3.2831 |
| 2001 | 3.2347 |
| 2000 | 3.18556 |
| 1999 | 3.13697 |
| 1998 | 3.08863 |
| 1997 | 3.04018 |
| 1996 | 2.99397 |
| 1995 | 2.95476 |
| 1994 | 2.91975 |
| 1993 | 2.88925 |
| 1992 | 2.85205 |
| 1991 | 2.81121 |
| 1990 | 2.77894 |
| 1989 | 2.75116 |
| 1988 | 2.70985 |
| 1987 | 2.66589 |
| 1986 | 2.62115 |
| 1985 | 2.57831 |
| 1984 | 2.53482 |
| 1983 | 2.56535 |
| 1982 | 2.61174 |
| 1981 | 2.60576 |
| 1980 | 2.62415 |
| 1979 | 2.66424 |
| 1978 | 2.72075 |
| 1977 | 2.79001 |
| 1976 | 2.86989 |
| 1975 | 2.96219 |
| 1974 | 3.00778 |
| 1973 | 2.99779 |
| 1972 | 2.98869 |
| 1971 | 2.97844 |
| 1970 | 2.96895 |
| 1969 | 2.96207 |
| 1968 | 2.95602 |
| 1967 | 2.94963 |
| 1966 | 2.94206 |
| 1965 | 2.93331 |
| 1964 | 2.92245 |
| 1963 | 2.90736 |
| 1962 | 2.90038 |
| 1961 | 2.90355 |
| 1960 | 2.906 |