| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.0962757 |
| 2020 | 0.0982785 |
| 2019 | 0.100295 |
| 2018 | 0.102262 |
| 2017 | 0.10424 |
| 2016 | 0.106245 |
| 2015 | 0.108405 |
| 2014 | 0.110634 |
| 2013 | 0.112935 |
| 2012 | 0.115427 |
| 2011 | 0.119584 |
| 2010 | 0.119404 |
| 2009 | 0.120356 |
| 2008 | 0.11364 |
| 2007 | 0.11011 |
| 2006 | 0.115761 |
| 2005 | 0.122462 |
| 2004 | 0.128105 |
| 2003 | 0.129652 |
| 2002 | 0.130693 |
| 2001 | 0.134154 |
| 2000 | 0.138159 |
| 1999 | 0.143382 |
| 1998 | 0.143982 |
| 1997 | 0.155247 |
| 1996 | 0.158805 |
| 1995 | 0.163367 |
| 1994 | 0.164691 |
| 1993 | 0.164106 |
| 1992 | 0.170513 |
| 1991 | 0.180483 |
| 1990 | 0.15839 |
| 1989 | 0.159515 |
| 1988 | 0.163959 |
| 1987 | 0.164387 |
| 1986 | 0.169134 |
| 1985 | 0.169664 |
| 1984 | 0.174777 |
| 1983 | 0.180167 |
| 1982 | 0.183141 |
| 1981 | 0.186461 |
| 1980 | 0.192012 |
| 1979 | 0.197807 |
| 1978 | 0.20375 |
| 1977 | 0.209831 |
| 1976 | 0.212979 |
| 1975 | 0.218948 |
| 1974 | 0.225053 |
| 1973 | 0.231251 |
| 1972 | 0.237509 |
| 1971 | 0.243731 |
| 1970 | 0.250075 |
| 1969 | 0.258086 |
| 1968 | 0.264852 |
| 1967 | 0.273207 |
| 1966 | 0.280236 |
| 1965 | 0.28975 |
| 1964 | 0.297164 |
| 1963 | 0.307147 |
| 1962 | 0.314885 |
| 1961 | 0.324462 |
| 1960 | - |