| 年份 | 利比里亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 31.287 |
| 2020 | 31.708 |
| 2019 | 32.181 |
| 2018 | 32.706 |
| 2017 | 33.151 |
| 2016 | 33.713 |
| 2015 | 34.215 |
| 2014 | 35.075 |
| 2013 | 36.138 |
| 2012 | 37.307 |
| 2011 | 37.395 |
| 2010 | 38.074 |
| 2009 | 38.94 |
| 2008 | 39.876 |
| 2007 | 40.863 |
| 2006 | 41.332 |
| 2005 | 41.482 |
| 2004 | 41.457 |
| 2003 | 41.746 |
| 2002 | 42.318 |
| 2001 | 43.041 |
| 2000 | 43.606 |
| 1999 | 44.068 |
| 1998 | 44.27 |
| 1997 | 44.386 |
| 1996 | 44.587 |
| 1995 | 44.661 |
| 1994 | 44.565 |
| 1993 | 44.597 |
| 1992 | 44.527 |
| 1991 | 44.629 |
| 1990 | 44.441 |
| 1989 | 44.461 |
| 1988 | 44.723 |
| 1987 | 44.988 |
| 1986 | 45.479 |
| 1985 | 45.744 |
| 1984 | 45.884 |
| 1983 | 46.453 |
| 1982 | 46.899 |
| 1981 | 47.486 |
| 1980 | 48.044 |
| 1979 | 48.498 |
| 1978 | 48.583 |
| 1977 | 48.685 |
| 1976 | 48.653 |
| 1975 | 48.621 |
| 1974 | 48.467 |
| 1973 | 48.387 |
| 1972 | 48.2 |
| 1971 | 48.036 |
| 1970 | 48.48 |
| 1969 | 49.063 |
| 1968 | 48.964 |
| 1967 | 49.031 |
| 1966 | 49.014 |
| 1965 | 49.084 |
| 1964 | 49.024 |
| 1963 | 48.924 |
| 1962 | 48.696 |
| 1961 | 48.378 |
| 1960 | 48.044 |