| 年份 | 美属维京群岛 |
|---|---|
| 2023 | - |
| 2022 | 20.4172 |
| 2021 | 20.0048 |
| 2020 | 19.6446 |
| 2019 | 19.2479 |
| 2018 | 18.7827 |
| 2017 | 18.3106 |
| 2016 | 17.8091 |
| 2015 | 17.2538 |
| 2014 | 16.6381 |
| 2013 | 15.956 |
| 2012 | 15.2186 |
| 2011 | 14.4573 |
| 2010 | 13.7005 |
| 2009 | 12.9805 |
| 2008 | 12.3082 |
| 2007 | 11.6932 |
| 2006 | 11.1346 |
| 2005 | 10.6296 |
| 2004 | 10.1248 |
| 2003 | 9.62316 |
| 2002 | 9.16728 |
| 2001 | 8.75507 |
| 2000 | 8.4032 |
| 1999 | 8.1065 |
| 1998 | 7.84703 |
| 1997 | 7.61781 |
| 1996 | 7.4218 |
| 1995 | 7.22354 |
| 1994 | 6.97772 |
| 1993 | 6.7209 |
| 1992 | 6.47117 |
| 1991 | 6.18763 |
| 1990 | 5.9413 |
| 1989 | 5.75115 |
| 1988 | 5.54976 |
| 1987 | 5.36753 |
| 1986 | 5.21017 |
| 1985 | 5.05434 |
| 1984 | 4.91697 |
| 1983 | 4.80986 |
| 1982 | 4.71134 |
| 1981 | 4.6296 |
| 1980 | 4.57575 |
| 1979 | 4.4452 |
| 1978 | 4.25304 |
| 1977 | 4.10349 |
| 1976 | 3.98055 |
| 1975 | 3.8891 |
| 1974 | 3.81077 |
| 1973 | 3.73797 |
| 1972 | 3.68576 |
| 1971 | 3.64907 |
| 1970 | 3.71264 |
| 1969 | 3.88426 |
| 1968 | 4.09539 |
| 1967 | 4.36631 |
| 1966 | 4.70825 |
| 1965 | 5.11419 |
| 1964 | 5.53255 |
| 1963 | 5.95862 |
| 1962 | 6.44182 |
| 1961 | 6.98897 |
| 1960 | 7.07971 |