| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 76 |
| 2020 | 78.3 |
| 2019 | 80.6 |
| 2018 | 82.6 |
| 2017 | 84.5 |
| 2016 | 86.3 |
| 2015 | 88.3 |
| 2014 | 92.2 |
| 2013 | 92 |
| 2012 | 94.2 |
| 2011 | 96.8 |
| 2010 | 99.9 |
| 2009 | 103.6 |
| 2008 | 108.2 |
| 2007 | 114 |
| 2006 | 121 |
| 2005 | 129.6 |
| 2004 | 139.7 |
| 2003 | 151 |
| 2002 | 163.3 |
| 2001 | 176.1 |
| 2000 | 189.2 |
| 1999 | 202 |
| 1998 | 214.5 |
| 1997 | 226.3 |
| 1996 | 237.4 |
| 1995 | 247.2 |
| 1994 | 255.4 |
| 1993 | 261.5 |
| 1992 | 265 |
| 1991 | 265.7 |
| 1990 | 263.6 |
| 1989 | 259.5 |
| 1988 | 254 |
| 1987 | 248.3 |
| 1986 | 243.2 |
| 1985 | 239.7 |
| 1984 | 237.9 |
| 1983 | 237.7 |
| 1982 | 238.9 |
| 1981 | 241 |
| 1980 | 243.8 |
| 1979 | 247 |
| 1978 | 250.5 |
| 1977 | 254.4 |
| 1976 | 258.7 |
| 1975 | 263.1 |
| 1974 | 267.9 |
| 1973 | 272.9 |
| 1972 | 277.6 |
| 1971 | 282.3 |
| 1970 | 287.2 |
| 1969 | 292.1 |
| 1968 | 297.2 |
| 1967 | 301.5 |
| 1966 | 305.4 |
| 1965 | 308.3 |
| 1964 | 310.7 |
| 1963 | 312.4 |
| 1962 | 313.3 |
| 1961 | 313.6 |
| 1960 | 312.8 |