| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 3.31464 |
| 2021 | 3.24569 |
| 2020 | 3.17096 |
| 2019 | 3.08762 |
| 2018 | 3.00296 |
| 2017 | 2.92773 |
| 2016 | 2.86428 |
| 2015 | 2.81443 |
| 2014 | 2.78067 |
| 2013 | 2.76401 |
| 2012 | 2.76294 |
| 2011 | 2.78244 |
| 2010 | 2.81701 |
| 2009 | 2.85586 |
| 2008 | 2.90361 |
| 2007 | 2.95553 |
| 2006 | 3.00744 |
| 2005 | 3.05979 |
| 2004 | 3.079 |
| 2003 | 3.08586 |
| 2002 | 3.12752 |
| 2001 | 3.1889 |
| 2000 | 3.26236 |
| 1999 | 3.37599 |
| 1998 | 3.49941 |
| 1997 | 3.58119 |
| 1996 | 3.63185 |
| 1995 | 3.65025 |
| 1994 | 3.64729 |
| 1993 | 3.62655 |
| 1992 | 3.60107 |
| 1991 | 3.57015 |
| 1990 | 3.49968 |
| 1989 | 3.43739 |
| 1988 | 3.38915 |
| 1987 | 3.34116 |
| 1986 | 3.29555 |
| 1985 | 3.2538 |
| 1984 | 3.21618 |
| 1983 | 3.1789 |
| 1982 | 3.14847 |
| 1981 | 3.12863 |
| 1980 | 3.11164 |
| 1979 | 3.0985 |
| 1978 | 3.08996 |
| 1977 | 3.08315 |
| 1976 | 3.07485 |
| 1975 | 3.06189 |
| 1974 | 3.04735 |
| 1973 | 3.02764 |
| 1972 | 2.99923 |
| 1971 | 2.97129 |
| 1970 | 2.95344 |
| 1969 | 2.94646 |
| 1968 | 2.94839 |
| 1967 | 2.95847 |
| 1966 | 2.96663 |
| 1965 | 2.9677 |
| 1964 | 2.96351 |
| 1963 | 2.95318 |
| 1962 | 2.93417 |
| 1961 | 2.91335 |
| 1960 | 2.89941 |