| 年份 | 萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 4.3731 |
| 2021 | 4.35722 |
| 2020 | 4.34674 |
| 2019 | 4.32145 |
| 2018 | 4.27784 |
| 2017 | 4.22592 |
| 2016 | 4.16916 |
| 2015 | 4.1113 |
| 2014 | 4.04958 |
| 2013 | 3.98108 |
| 2012 | 3.90742 |
| 2011 | 3.8411 |
| 2010 | 3.77669 |
| 2009 | 3.70378 |
| 2008 | 3.62781 |
| 2007 | 3.55265 |
| 2006 | 3.44281 |
| 2005 | 3.29314 |
| 2004 | 3.14357 |
| 2003 | 3.00346 |
| 2002 | 2.87276 |
| 2001 | 2.78003 |
| 2000 | 2.72929 |
| 1999 | 2.69817 |
| 1998 | 2.68284 |
| 1997 | 2.68501 |
| 1996 | 2.70002 |
| 1995 | 2.71996 |
| 1994 | 2.74771 |
| 1993 | 2.77673 |
| 1992 | 2.80263 |
| 1991 | 2.83362 |
| 1990 | 2.86091 |
| 1989 | 2.87632 |
| 1988 | 2.89674 |
| 1987 | 2.92738 |
| 1986 | 2.92807 |
| 1985 | 2.89438 |
| 1984 | 2.87384 |
| 1983 | 2.88579 |
| 1982 | 2.92712 |
| 1981 | 2.96487 |
| 1980 | 2.97484 |
| 1979 | 2.96066 |
| 1978 | 2.93075 |
| 1977 | 2.8911 |
| 1976 | 2.8198 |
| 1975 | 2.72282 |
| 1974 | 2.64639 |
| 1973 | 2.61156 |
| 1972 | 2.59567 |
| 1971 | 2.56829 |
| 1970 | 2.52098 |
| 1969 | 2.45393 |
| 1968 | 2.37834 |
| 1967 | 2.3042 |
| 1966 | 2.2638 |
| 1965 | 2.25683 |
| 1964 | 2.25134 |
| 1963 | 2.24656 |
| 1962 | 2.24622 |
| 1961 | 2.2574 |
| 1960 | 2.27629 |