| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | -1.7065 |
| 2021 | -2.53017 |
| 2020 | -2.42125 |
| 2019 | -2.30414 |
| 2018 | -2.12294 |
| 2017 | -1.97182 |
| 2016 | -1.80723 |
| 2015 | -1.63927 |
| 2014 | -1.47895 |
| 2013 | -1.30478 |
| 2012 | -1.1463 |
| 2011 | -0.987558 |
| 2010 | -0.938173 |
| 2009 | -0.943768 |
| 2008 | -0.876433 |
| 2007 | -0.801983 |
| 2006 | -0.730999 |
| 2005 | -0.647635 |
| 2004 | -0.54514 |
| 2003 | -0.406484 |
| 2002 | -0.252358 |
| 2001 | 0.161299 |
| 2000 | 1.09823 |
| 1999 | 1.73564 |
| 1998 | 1.82745 |
| 1997 | 1.95867 |
| 1996 | 2.03712 |
| 1995 | 2.10626 |
| 1994 | 2.15353 |
| 1993 | 2.16498 |
| 1992 | 2.19248 |
| 1991 | 2.42549 |
| 1990 | 3.25194 |
| 1989 | 3.86747 |
| 1988 | 3.86891 |
| 1987 | 3.85711 |
| 1986 | 3.85291 |
| 1985 | 3.84213 |
| 1984 | 3.82675 |
| 1983 | 3.79508 |
| 1982 | 3.76849 |
| 1981 | 3.50473 |
| 1980 | 2.59059 |
| 1979 | 1.94419 |
| 1978 | 1.96652 |
| 1977 | 2.02583 |
| 1976 | 2.09139 |
| 1975 | 1.91522 |
| 1974 | 1.67884 |
| 1973 | 1.64691 |
| 1972 | 1.68899 |
| 1971 | 1.89513 |
| 1970 | 2.53983 |
| 1969 | 3.03077 |
| 1968 | 3.01275 |
| 1967 | 2.9653 |
| 1966 | 3.0773 |
| 1965 | 3.19266 |
| 1964 | 3.17031 |
| 1963 | 3.13299 |
| 1962 | 3.08392 |
| 1961 | 2.65791 |
| 1960 | - |