| 年份 | 萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | 0.561411 |
| 2021 | 0.558043 |
| 2020 | 0.554572 |
| 2019 | 0.552491 |
| 2018 | 0.551362 |
| 2017 | 0.549854 |
| 2016 | 0.549325 |
| 2015 | 0.550381 |
| 2014 | 0.553424 |
| 2013 | 0.557507 |
| 2012 | 0.560662 |
| 2011 | 0.562753 |
| 2010 | 0.565579 |
| 2009 | 0.569928 |
| 2008 | 0.574012 |
| 2007 | 0.575816 |
| 2006 | 0.569795 |
| 2005 | 0.548259 |
| 2004 | 0.516224 |
| 2003 | 0.480163 |
| 2002 | 0.438191 |
| 2001 | 0.402925 |
| 2000 | 0.382884 |
| 1999 | 0.370999 |
| 1998 | 0.365334 |
| 1997 | 0.366552 |
| 1996 | 0.371558 |
| 1995 | 0.375525 |
| 1994 | 0.377321 |
| 1993 | 0.38125 |
| 1992 | 0.384829 |
| 1991 | 0.391427 |
| 1990 | 0.403048 |
| 1989 | 0.408558 |
| 1988 | 0.405884 |
| 1987 | 0.396913 |
| 1986 | 0.380484 |
| 1985 | 0.363584 |
| 1984 | 0.351782 |
| 1983 | 0.336733 |
| 1982 | 0.319144 |
| 1981 | 0.312458 |
| 1980 | 0.31844 |
| 1979 | 0.32706 |
| 1978 | 0.331266 |
| 1977 | 0.329191 |
| 1976 | 0.316228 |
| 1975 | 0.299355 |
| 1974 | 0.28656 |
| 1973 | 0.276229 |
| 1972 | 0.268563 |
| 1971 | 0.262696 |
| 1970 | 0.256704 |
| 1969 | 0.250556 |
| 1968 | 0.2463 |
| 1967 | 0.243522 |
| 1966 | 0.259614 |
| 1965 | 0.296736 |
| 1964 | 0.341947 |
| 1963 | 0.402042 |
| 1962 | 0.481045 |
| 1961 | 0.513272 |
| 1960 | 0.5008 |