| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 5.06485 |
| 2021 | 4.76567 |
| 2020 | 4.48031 |
| 2019 | 4.21887 |
| 2018 | 4.00165 |
| 2017 | 3.83443 |
| 2016 | 3.69526 |
| 2015 | 3.55847 |
| 2014 | 3.4054 |
| 2013 | 3.24061 |
| 2012 | 3.07369 |
| 2011 | 2.89223 |
| 2010 | 2.72537 |
| 2009 | 2.57608 |
| 2008 | 2.41258 |
| 2007 | 2.26636 |
| 2006 | 2.14302 |
| 2005 | 2.03684 |
| 2004 | 1.96182 |
| 2003 | 1.96171 |
| 2002 | 1.98025 |
| 2001 | 1.97735 |
| 2000 | 1.97746 |
| 1999 | 1.95686 |
| 1998 | 1.88968 |
| 1997 | 1.799 |
| 1996 | 1.72527 |
| 1995 | 1.66839 |
| 1994 | 1.65825 |
| 1993 | 1.69963 |
| 1992 | 1.76279 |
| 1991 | 1.84091 |
| 1990 | 1.93295 |
| 1989 | 2.00661 |
| 1988 | 2.03192 |
| 1987 | 2.03182 |
| 1986 | 1.98352 |
| 1985 | 1.89513 |
| 1984 | 1.82082 |
| 1983 | 1.77635 |
| 1982 | 1.75687 |
| 1981 | 1.78035 |
| 1980 | 1.79897 |
| 1979 | 1.77905 |
| 1978 | 1.76539 |
| 1977 | 1.74083 |
| 1976 | 1.7057 |
| 1975 | 1.65906 |
| 1974 | 1.56773 |
| 1973 | 1.4609 |
| 1972 | 1.38929 |
| 1971 | 1.3525 |
| 1970 | 1.34743 |
| 1969 | 1.37124 |
| 1968 | 1.40733 |
| 1967 | 1.45142 |
| 1966 | 1.51669 |
| 1965 | 1.57869 |
| 1964 | 1.58687 |
| 1963 | 1.54162 |
| 1962 | 1.47165 |
| 1961 | 1.38958 |
| 1960 | 1.34063 |