| 年份 | 美属维京群岛 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 11.8 |
| 2020 | 12.1 |
| 2019 | 12.3 |
| 2018 | 12.6 |
| 2017 | 12.8 |
| 2016 | 13 |
| 2015 | 13.2 |
| 2014 | 13.2 |
| 2013 | 13.1 |
| 2012 | 13.1 |
| 2011 | 13.8 |
| 2010 | 14.8 |
| 2009 | 15.3 |
| 2008 | 15.8 |
| 2007 | 16.4 |
| 2006 | 13.2 |
| 2005 | 14.8 |
| 2004 | 14.5 |
| 2003 | 14 |
| 2002 | 15.1 |
| 2001 | 13.1 |
| 2000 | 14.4 |
| 1999 | 16.1 |
| 1998 | 18 |
| 1997 | 17.2 |
| 1996 | 17.6 |
| 1995 | 18.7 |
| 1994 | 19.8 |
| 1993 | 20.9 |
| 1992 | 22 |
| 1991 | 21.1 |
| 1990 | 21.4 |
| 1989 | 21.7 |
| 1988 | 22 |
| 1987 | 22.3 |
| 1986 | 23.65 |
| 1985 | 25 |
| 1984 | 24.9 |
| 1983 | 24.8 |
| 1982 | 24.7 |
| 1981 | 25.25 |
| 1980 | 25.8 |
| 1979 | 26.35 |
| 1978 | 26.9 |
| 1977 | 26.75 |
| 1976 | 26.6 |
| 1975 | 28.1 |
| 1974 | 29.7 |
| 1973 | 30.1 |
| 1972 | 30.5 |
| 1971 | 30.8 |
| 1970 | 31.2 |
| 1969 | 31.6 |
| 1968 | 32 |
| 1967 | 32.3 |
| 1966 | 32.7 |
| 1965 | 33.1 |
| 1964 | 33.48 |
| 1963 | 33.86 |
| 1962 | 34.24 |
| 1961 | 34.62 |
| 1960 | 35 |