| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | 13.9196 |
| 2021 | 14.0926 |
| 2020 | 14.2783 |
| 2019 | 14.4808 |
| 2018 | 14.7097 |
| 2017 | 14.9824 |
| 2016 | 15.2366 |
| 2015 | 15.4599 |
| 2014 | 15.6741 |
| 2013 | 15.8432 |
| 2012 | 15.9643 |
| 2011 | 16.2258 |
| 2010 | 16.537 |
| 2009 | 16.6706 |
| 2008 | 16.7572 |
| 2007 | 16.7914 |
| 2006 | 16.7773 |
| 2005 | 16.7727 |
| 2004 | 16.7909 |
| 2003 | 16.8273 |
| 2002 | 16.8424 |
| 2001 | 16.8139 |
| 2000 | 16.7502 |
| 1999 | 16.6567 |
| 1998 | 16.5496 |
| 1997 | 16.4515 |
| 1996 | 16.3748 |
| 1995 | 16.3263 |
| 1994 | 16.3119 |
| 1993 | 16.3383 |
| 1992 | 16.3789 |
| 1991 | 16.4419 |
| 1990 | 16.6128 |
| 1989 | 16.7875 |
| 1988 | 17.0139 |
| 1987 | 17.2769 |
| 1986 | 17.5125 |
| 1985 | 17.7804 |
| 1984 | 18.0958 |
| 1983 | 18.276 |
| 1982 | 18.3669 |
| 1981 | 18.4898 |
| 1980 | 18.5377 |
| 1979 | 18.4943 |
| 1978 | 18.3724 |
| 1977 | 18.2041 |
| 1976 | 18.0202 |
| 1975 | 17.8342 |
| 1974 | 17.7279 |
| 1973 | 17.7201 |
| 1972 | 17.7189 |
| 1971 | 17.7179 |
| 1970 | 17.7127 |
| 1969 | 17.6837 |
| 1968 | 17.6342 |
| 1967 | 17.5973 |
| 1966 | 17.5653 |
| 1965 | 17.5329 |
| 1964 | 17.5007 |
| 1963 | 17.4648 |
| 1962 | 17.4057 |
| 1961 | 17.321 |
| 1960 | 17.2308 |