| 年份 | 美属萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 5.18315 |
| 2021 | 5.24048 |
| 2020 | 5.35918 |
| 2019 | 5.51375 |
| 2018 | 5.69576 |
| 2017 | 5.89601 |
| 2016 | 6.08339 |
| 2015 | 6.21757 |
| 2014 | 6.30153 |
| 2013 | 6.35796 |
| 2012 | 6.37979 |
| 2011 | 6.37812 |
| 2010 | 6.41436 |
| 2009 | 6.50587 |
| 2008 | 6.60429 |
| 2007 | 6.72186 |
| 2006 | 6.84626 |
| 2005 | 6.95714 |
| 2004 | 7.05657 |
| 2003 | 7.12983 |
| 2002 | 7.16945 |
| 2001 | 7.19733 |
| 2000 | 7.19236 |
| 1999 | 7.1297 |
| 1998 | 6.99977 |
| 1997 | 6.80461 |
| 1996 | 6.58228 |
| 1995 | 6.36708 |
| 1994 | 6.17683 |
| 1993 | 6.0378 |
| 1992 | 5.95172 |
| 1991 | 5.90182 |
| 1990 | 5.85039 |
| 1989 | 5.78678 |
| 1988 | 5.71982 |
| 1987 | 5.63782 |
| 1986 | 5.5474 |
| 1985 | 5.46305 |
| 1984 | 5.3604 |
| 1983 | 5.20636 |
| 1982 | 5.03618 |
| 1981 | 4.85169 |
| 1980 | 4.67609 |
| 1979 | 4.59748 |
| 1978 | 4.65245 |
| 1977 | 4.72843 |
| 1976 | 4.77528 |
| 1975 | 4.83548 |
| 1974 | 4.8582 |
| 1973 | 4.80521 |
| 1972 | 4.72796 |
| 1971 | 4.66354 |
| 1970 | 4.61064 |
| 1969 | 4.65062 |
| 1968 | 4.80006 |
| 1967 | 4.97512 |
| 1966 | 5.13896 |
| 1965 | 5.25211 |
| 1964 | 5.28957 |
| 1963 | 5.30225 |
| 1962 | 5.2883 |
| 1961 | 5.22462 |
| 1960 | 5.14251 |