| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 7.26297 |
| 2021 | 6.84468 |
| 2020 | 6.45392 |
| 2019 | 6.10518 |
| 2018 | 5.78535 |
| 2017 | 5.48693 |
| 2016 | 5.20734 |
| 2015 | 4.94861 |
| 2014 | 4.71977 |
| 2013 | 4.51458 |
| 2012 | 4.32936 |
| 2011 | 4.17695 |
| 2010 | 4.04106 |
| 2009 | 3.96453 |
| 2008 | 3.94164 |
| 2007 | 3.8895 |
| 2006 | 3.8179 |
| 2005 | 3.74297 |
| 2004 | 3.64769 |
| 2003 | 3.52603 |
| 2002 | 3.39911 |
| 2001 | 3.28424 |
| 2000 | 3.17966 |
| 1999 | 3.14008 |
| 1998 | 3.16856 |
| 1997 | 3.20813 |
| 1996 | 3.24587 |
| 1995 | 3.27896 |
| 1994 | 3.29231 |
| 1993 | 3.27901 |
| 1992 | 3.24996 |
| 1991 | 3.2128 |
| 1990 | 3.17872 |
| 1989 | 3.14228 |
| 1988 | 3.10563 |
| 1987 | 3.07292 |
| 1986 | 3.05552 |
| 1985 | 3.04058 |
| 1984 | 3.00776 |
| 1983 | 2.95767 |
| 1982 | 2.90529 |
| 1981 | 2.85677 |
| 1980 | 2.82039 |
| 1979 | 2.7929 |
| 1978 | 2.72687 |
| 1977 | 2.64964 |
| 1976 | 2.59459 |
| 1975 | 2.56319 |
| 1974 | 2.5455 |
| 1973 | 2.522 |
| 1972 | 2.49973 |
| 1971 | 2.49153 |
| 1970 | 2.48199 |
| 1969 | 2.4795 |
| 1968 | 2.46598 |
| 1967 | 2.42273 |
| 1966 | 2.38372 |
| 1965 | 2.37485 |
| 1964 | 2.3901 |
| 1963 | 2.41013 |
| 1962 | 2.47273 |
| 1961 | 2.56472 |
| 1960 | 2.62129 |