| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 1.8516 |
| 2021 | 1.75872 |
| 2020 | 1.66881 |
| 2019 | 1.58066 |
| 2018 | 1.47924 |
| 2017 | 1.38256 |
| 2016 | 1.31141 |
| 2015 | 1.25102 |
| 2014 | 1.20424 |
| 2013 | 1.17928 |
| 2012 | 1.16053 |
| 2011 | 1.13859 |
| 2010 | 1.1135 |
| 2009 | 1.09979 |
| 2008 | 1.07909 |
| 2007 | 1.04063 |
| 2006 | 1.00198 |
| 2005 | 0.957828 |
| 2004 | 0.913336 |
| 2003 | 0.880368 |
| 2002 | 0.85392 |
| 2001 | 0.822255 |
| 2000 | 0.789008 |
| 1999 | 0.783379 |
| 1998 | 0.800042 |
| 1997 | 0.800197 |
| 1996 | 0.801078 |
| 1995 | 0.815078 |
| 1994 | 0.822445 |
| 1993 | 0.828308 |
| 1992 | 0.839959 |
| 1991 | 0.848014 |
| 1990 | 0.863984 |
| 1989 | 0.890058 |
| 1988 | 0.901413 |
| 1987 | 0.898789 |
| 1986 | 0.894463 |
| 1985 | 0.87579 |
| 1984 | 0.838875 |
| 1983 | 0.800319 |
| 1982 | 0.765553 |
| 1981 | 0.74689 |
| 1980 | 0.74138 |
| 1979 | 0.736418 |
| 1978 | 0.750826 |
| 1977 | 0.778445 |
| 1976 | 0.80721 |
| 1975 | 0.834078 |
| 1974 | 0.833361 |
| 1973 | 0.786131 |
| 1972 | 0.716032 |
| 1971 | 0.643533 |
| 1970 | 0.576484 |
| 1969 | 0.54267 |
| 1968 | 0.543353 |
| 1967 | 0.571429 |
| 1966 | 0.616883 |
| 1965 | 0.65231 |
| 1964 | 0.663993 |
| 1963 | 0.662458 |
| 1962 | 0.650809 |
| 1961 | 0.623406 |
| 1960 | 0.591429 |