| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 1.84633 |
| 2021 | 1.85213 |
| 2020 | 1.8654 |
| 2019 | 1.88128 |
| 2018 | 1.8984 |
| 2017 | 1.91716 |
| 2016 | 1.93641 |
| 2015 | 1.95535 |
| 2014 | 1.95591 |
| 2013 | 1.95306 |
| 2012 | 1.97238 |
| 2011 | 2.01752 |
| 2010 | 2.07645 |
| 2009 | 2.15051 |
| 2008 | 2.2319 |
| 2007 | 2.2844 |
| 2006 | 2.31578 |
| 2005 | 2.33223 |
| 2004 | 2.33575 |
| 2003 | 2.32559 |
| 2002 | 2.30691 |
| 2001 | 2.2832 |
| 2000 | 2.25295 |
| 1999 | 2.21748 |
| 1998 | 2.17883 |
| 1997 | 2.14162 |
| 1996 | 2.10101 |
| 1995 | 2.06053 |
| 1994 | 2.02165 |
| 1993 | 1.98748 |
| 1992 | 1.95537 |
| 1991 | 1.9241 |
| 1990 | 1.89642 |
| 1989 | 1.87758 |
| 1988 | 1.85823 |
| 1987 | 1.83972 |
| 1986 | 1.81997 |
| 1985 | 1.79863 |
| 1984 | 1.7752 |
| 1983 | 1.76229 |
| 1982 | 1.74951 |
| 1981 | 1.72945 |
| 1980 | 1.72124 |
| 1979 | 1.72376 |
| 1978 | 1.73604 |
| 1977 | 1.75623 |
| 1976 | 1.77722 |
| 1975 | 1.79594 |
| 1974 | 1.80324 |
| 1973 | 1.79726 |
| 1972 | 1.78767 |
| 1971 | 1.77778 |
| 1970 | 1.77158 |
| 1969 | 1.7689 |
| 1968 | 1.76867 |
| 1967 | 1.77129 |
| 1966 | 1.77574 |
| 1965 | 1.78201 |
| 1964 | 1.79082 |
| 1963 | 1.80299 |
| 1962 | 1.81908 |
| 1961 | 1.8368 |
| 1960 | 1.85306 |