| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 6.0604 |
| 2021 | 6.13954 |
| 2020 | 6.17573 |
| 2019 | 6.18641 |
| 2018 | 6.16097 |
| 2017 | 6.10601 |
| 2016 | 6.05165 |
| 2015 | 5.94639 |
| 2014 | 5.79802 |
| 2013 | 5.62603 |
| 2012 | 5.39958 |
| 2011 | 5.15556 |
| 2010 | 4.9303 |
| 2009 | 4.73254 |
| 2008 | 4.58083 |
| 2007 | 4.45909 |
| 2006 | 4.34666 |
| 2005 | 4.23309 |
| 2004 | 4.11383 |
| 2003 | 3.98478 |
| 2002 | 3.84864 |
| 2001 | 3.70164 |
| 2000 | 3.55243 |
| 1999 | 3.38245 |
| 1998 | 3.18433 |
| 1997 | 3.02468 |
| 1996 | 2.90483 |
| 1995 | 2.8196 |
| 1994 | 2.79377 |
| 1993 | 2.85074 |
| 1992 | 2.91546 |
| 1991 | 2.93625 |
| 1990 | 2.94023 |
| 1989 | 2.89894 |
| 1988 | 2.80225 |
| 1987 | 2.7027 |
| 1986 | 2.653 |
| 1985 | 2.66043 |
| 1984 | 2.74734 |
| 1983 | 2.89738 |
| 1982 | 3.06802 |
| 1981 | 3.22745 |
| 1980 | 3.33074 |
| 1979 | 3.35725 |
| 1978 | 3.31621 |
| 1977 | 3.2396 |
| 1976 | 3.12035 |
| 1975 | 2.97594 |
| 1974 | 2.86771 |
| 1973 | 2.8108 |
| 1972 | 2.78586 |
| 1971 | 2.80108 |
| 1970 | 2.82284 |
| 1969 | 2.81973 |
| 1968 | 2.80668 |
| 1967 | 2.79183 |
| 1966 | 2.77919 |
| 1965 | 2.73757 |
| 1964 | 2.66739 |
| 1963 | 2.5647 |
| 1962 | 2.4415 |
| 1961 | 2.31597 |
| 1960 | 2.21563 |