| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 6.39373 |
| 2021 | 6.32823 |
| 2020 | 6.23459 |
| 2019 | 6.15692 |
| 2018 | 6.07027 |
| 2017 | 5.97154 |
| 2016 | 5.84588 |
| 2015 | 5.69758 |
| 2014 | 5.52693 |
| 2013 | 5.33491 |
| 2012 | 5.13632 |
| 2011 | 4.95458 |
| 2010 | 4.78119 |
| 2009 | 4.60479 |
| 2008 | 4.4402 |
| 2007 | 4.28163 |
| 2006 | 4.13816 |
| 2005 | 3.99841 |
| 2004 | 3.87569 |
| 2003 | 3.7849 |
| 2002 | 3.7099 |
| 2001 | 3.61253 |
| 2000 | 3.5185 |
| 1999 | 3.44346 |
| 1998 | 3.35948 |
| 1997 | 3.29244 |
| 1996 | 3.25999 |
| 1995 | 3.24383 |
| 1994 | 3.25614 |
| 1993 | 3.29224 |
| 1992 | 3.32866 |
| 1991 | 3.35424 |
| 1990 | 3.35813 |
| 1989 | 3.33088 |
| 1988 | 3.24903 |
| 1987 | 3.14007 |
| 1986 | 3.05963 |
| 1985 | 3.02344 |
| 1984 | 3.01535 |
| 1983 | 3.03377 |
| 1982 | 3.07879 |
| 1981 | 3.11109 |
| 1980 | 3.12928 |
| 1979 | 3.13512 |
| 1978 | 3.10923 |
| 1977 | 3.0407 |
| 1976 | 2.96301 |
| 1975 | 2.91596 |
| 1974 | 2.90496 |
| 1973 | 2.94542 |
| 1972 | 3.0248 |
| 1971 | 3.10389 |
| 1970 | 3.14709 |
| 1969 | 3.16682 |
| 1968 | 3.16063 |
| 1967 | 3.12118 |
| 1966 | 3.05195 |
| 1965 | 2.9563 |
| 1964 | 2.85431 |
| 1963 | 2.7432 |
| 1962 | 2.63532 |
| 1961 | 2.55974 |
| 1960 | 2.54993 |