| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 2.39737 |
| 2021 | 2.20039 |
| 2020 | 2.0242 |
| 2019 | 1.86875 |
| 2018 | 1.71058 |
| 2017 | 1.58102 |
| 2016 | 1.47374 |
| 2015 | 1.37735 |
| 2014 | 1.30297 |
| 2013 | 1.28562 |
| 2012 | 1.27071 |
| 2011 | 1.23926 |
| 2010 | 1.21924 |
| 2009 | 1.19864 |
| 2008 | 1.16014 |
| 2007 | 1.10624 |
| 2006 | 1.05903 |
| 2005 | 1.01665 |
| 2004 | 0.99676 |
| 2003 | 0.999264 |
| 2002 | 1.01722 |
| 2001 | 1.04539 |
| 2000 | 1.07098 |
| 1999 | 1.09088 |
| 1998 | 1.0945 |
| 1997 | 1.08602 |
| 1996 | 1.05204 |
| 1995 | 1.00946 |
| 1994 | 0.976937 |
| 1993 | 0.936899 |
| 1992 | 0.894703 |
| 1991 | 0.862863 |
| 1990 | 0.833315 |
| 1989 | 0.827951 |
| 1988 | 0.86028 |
| 1987 | 0.893713 |
| 1986 | 0.913367 |
| 1985 | 0.904907 |
| 1984 | 0.870126 |
| 1983 | 0.825432 |
| 1982 | 0.787265 |
| 1981 | 0.75057 |
| 1980 | 0.72394 |
| 1979 | 0.71736 |
| 1978 | 0.725015 |
| 1977 | 0.759334 |
| 1976 | 0.808853 |
| 1975 | 0.85027 |
| 1974 | 0.866655 |
| 1973 | 0.859353 |
| 1972 | 0.811027 |
| 1971 | 0.713203 |
| 1970 | 0.605969 |
| 1969 | 0.544633 |
| 1968 | 0.53024 |
| 1967 | 0.526294 |
| 1966 | 0.58041 |
| 1965 | 0.695325 |
| 1964 | 0.786654 |
| 1963 | 0.836214 |
| 1962 | 0.878166 |
| 1961 | 0.906465 |
| 1960 | 0.890344 |