| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 1.22994 |
| 2021 | 1.12987 |
| 2020 | 1.03574 |
| 2019 | 0.962751 |
| 2018 | 0.944833 |
| 2017 | 0.928824 |
| 2016 | 0.898524 |
| 2015 | 0.875961 |
| 2014 | 0.847506 |
| 2013 | 0.796405 |
| 2012 | 0.736562 |
| 2011 | 0.693839 |
| 2010 | 0.658354 |
| 2009 | 0.658615 |
| 2008 | 0.687758 |
| 2007 | 0.718339 |
| 2006 | 0.750593 |
| 2005 | 0.781084 |
| 2004 | 0.792477 |
| 2003 | 0.778374 |
| 2002 | 0.749803 |
| 2001 | 0.694602 |
| 2000 | 0.636987 |
| 1999 | 0.610965 |
| 1998 | 0.600444 |
| 1997 | 0.589868 |
| 1996 | 0.585091 |
| 1995 | 0.570816 |
| 1994 | 0.559928 |
| 1993 | 0.570548 |
| 1992 | 0.589644 |
| 1991 | 0.622016 |
| 1990 | 0.642168 |
| 1989 | 0.625957 |
| 1988 | 0.583514 |
| 1987 | 0.534311 |
| 1986 | 0.490281 |
| 1985 | 0.465381 |
| 1984 | 0.464604 |
| 1983 | 0.471277 |
| 1982 | 0.497829 |
| 1981 | 0.540411 |
| 1980 | 0.574802 |
| 1979 | 0.593018 |
| 1978 | 0.588465 |
| 1977 | 0.55375 |
| 1976 | 0.490727 |
| 1975 | 0.421678 |
| 1974 | 0.366391 |
| 1973 | 0.318677 |
| 1972 | 0.276404 |
| 1971 | 0.269761 |
| 1970 | 0.312394 |
| 1969 | 0.382402 |
| 1968 | 0.462465 |
| 1967 | 0.534517 |
| 1966 | 0.571937 |
| 1965 | 0.559759 |
| 1964 | 0.515394 |
| 1963 | 0.47183 |
| 1962 | 0.448733 |
| 1961 | 0.443271 |
| 1960 | 0.440055 |