| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 81.9 |
| 2020 | 84.2 |
| 2019 | 86.5 |
| 2018 | 88.6 |
| 2017 | 90.6 |
| 2016 | 92.4 |
| 2015 | 94.6 |
| 2014 | 98.6 |
| 2013 | 98.5 |
| 2012 | 100.9 |
| 2011 | 103.5 |
| 2010 | 106.7 |
| 2009 | 110.7 |
| 2008 | 115.4 |
| 2007 | 121.5 |
| 2006 | 128.9 |
| 2005 | 137.9 |
| 2004 | 148.4 |
| 2003 | 160.3 |
| 2002 | 173 |
| 2001 | 186.3 |
| 2000 | 199.7 |
| 1999 | 212.9 |
| 1998 | 225.7 |
| 1997 | 238.3 |
| 1996 | 250.2 |
| 1995 | 260.4 |
| 1994 | 268.8 |
| 1993 | 274.9 |
| 1992 | 278.7 |
| 1991 | 279.7 |
| 1990 | 277.8 |
| 1989 | 273.5 |
| 1988 | 267.8 |
| 1987 | 261.9 |
| 1986 | 256.7 |
| 1985 | 253.2 |
| 1984 | 251.5 |
| 1983 | 251.4 |
| 1982 | 252.5 |
| 1981 | 254.8 |
| 1980 | 257.7 |
| 1979 | 260.9 |
| 1978 | 264.5 |
| 1977 | 268.5 |
| 1976 | 272.8 |
| 1975 | 277.6 |
| 1974 | 282.6 |
| 1973 | 287.6 |
| 1972 | 292.7 |
| 1971 | 297.7 |
| 1970 | 302.8 |
| 1969 | 308.2 |
| 1968 | 313.4 |
| 1967 | 318.1 |
| 1966 | 322.3 |
| 1965 | 325.2 |
| 1964 | 327.3 |
| 1963 | 329 |
| 1962 | 330 |
| 1961 | 330 |
| 1960 | 329.6 |