| 年份 | 萨摩亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 18.3 |
| 2020 | 18.8 |
| 2019 | 19.2 |
| 2018 | 19.6 |
| 2017 | 20 |
| 2016 | 20.2 |
| 2015 | 20.4 |
| 2014 | 20.6 |
| 2013 | 20.8 |
| 2012 | 21 |
| 2011 | 21.1 |
| 2010 | 21.2 |
| 2009 | 27.5 |
| 2008 | 21.2 |
| 2007 | 21.1 |
| 2006 | 21.1 |
| 2005 | 21.1 |
| 2004 | 21.2 |
| 2003 | 21.5 |
| 2002 | 21.9 |
| 2001 | 22.5 |
| 2000 | 23.2 |
| 1999 | 24 |
| 1998 | 24.9 |
| 1997 | 25.8 |
| 1996 | 26.7 |
| 1995 | 27.6 |
| 1994 | 28.6 |
| 1993 | 29.6 |
| 1992 | 30.6 |
| 1991 | 31.5 |
| 1990 | 32.5 |
| 1989 | 33.5 |
| 1988 | 34.6 |
| 1987 | 35.9 |
| 1986 | 37.2 |
| 1985 | 38.6 |
| 1984 | 40.2 |
| 1983 | 41.9 |
| 1982 | 43.6 |
| 1981 | 45.6 |
| 1980 | 47.6 |
| 1979 | 49.9 |
| 1978 | 52.4 |
| 1977 | 55 |
| 1976 | 57.8 |
| 1975 | 60.7 |
| 1974 | 63.7 |
| 1973 | 66.9 |
| 1972 | 70.1 |
| 1971 | 73.4 |
| 1970 | 76.9 |
| 1969 | 80.4 |
| 1968 | 84 |
| 1967 | 87.6 |
| 1966 | 90.9 |
| 1965 | 94.2 |
| 1964 | 116.5 |
| 1963 | 101 |
| 1962 | 104.5 |
| 1961 | 108.3 |
| 1960 | 112.6 |