| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 4.61299 |
| 2021 | 4.37884 |
| 2020 | 4.15131 |
| 2019 | 3.91765 |
| 2018 | 3.69396 |
| 2017 | 3.48374 |
| 2016 | 3.30626 |
| 2015 | 3.14892 |
| 2014 | 3.02302 |
| 2013 | 2.93505 |
| 2012 | 2.85228 |
| 2011 | 2.74321 |
| 2010 | 2.64095 |
| 2009 | 2.55186 |
| 2008 | 2.45361 |
| 2007 | 2.36156 |
| 2006 | 2.28354 |
| 2005 | 2.20852 |
| 2004 | 2.15677 |
| 2003 | 2.13464 |
| 2002 | 2.12043 |
| 2001 | 2.10282 |
| 2000 | 2.08042 |
| 1999 | 2.06063 |
| 1998 | 2.01396 |
| 1997 | 1.94233 |
| 1996 | 1.87696 |
| 1995 | 1.82797 |
| 1994 | 1.7963 |
| 1993 | 1.80166 |
| 1992 | 1.85142 |
| 1991 | 1.90306 |
| 1990 | 1.91747 |
| 1989 | 1.89795 |
| 1988 | 1.86846 |
| 1987 | 1.82488 |
| 1986 | 1.79129 |
| 1985 | 1.77618 |
| 1984 | 1.76982 |
| 1983 | 1.78676 |
| 1982 | 1.82682 |
| 1981 | 1.8701 |
| 1980 | 1.88769 |
| 1979 | 1.89757 |
| 1978 | 1.90355 |
| 1977 | 1.89051 |
| 1976 | 1.85107 |
| 1975 | 1.77407 |
| 1974 | 1.69709 |
| 1973 | 1.63405 |
| 1972 | 1.55082 |
| 1971 | 1.45417 |
| 1970 | 1.37413 |
| 1969 | 1.35296 |
| 1968 | 1.41961 |
| 1967 | 1.533 |
| 1966 | 1.63961 |
| 1965 | 1.70186 |
| 1964 | 1.69448 |
| 1963 | 1.60057 |
| 1962 | 1.46203 |
| 1961 | 1.31293 |
| 1960 | 1.19255 |