| 年份 | 美属维京群岛 |
|---|---|
| 2023 | - |
| 2022 | 7.30408 |
| 2021 | 7.10471 |
| 2020 | 6.80892 |
| 2019 | 6.57168 |
| 2018 | 6.49181 |
| 2017 | 6.42671 |
| 2016 | 6.39372 |
| 2015 | 6.40525 |
| 2014 | 6.46819 |
| 2013 | 6.59802 |
| 2012 | 6.80021 |
| 2011 | 7.0727 |
| 2010 | 7.42055 |
| 2009 | 7.74721 |
| 2008 | 8.03661 |
| 2007 | 8.35106 |
| 2006 | 8.64001 |
| 2005 | 8.86682 |
| 2004 | 9.02653 |
| 2003 | 9.11325 |
| 2002 | 9.15665 |
| 2001 | 9.20052 |
| 2000 | 9.25594 |
| 1999 | 9.3224 |
| 1998 | 9.41598 |
| 1997 | 9.50643 |
| 1996 | 9.56956 |
| 1995 | 9.66831 |
| 1994 | 9.72586 |
| 1993 | 9.58178 |
| 1992 | 9.4088 |
| 1991 | 9.42642 |
| 1990 | 9.4269 |
| 1989 | 9.39757 |
| 1988 | 9.6025 |
| 1987 | 9.98839 |
| 1986 | 10.4365 |
| 1985 | 11.0049 |
| 1984 | 11.6215 |
| 1983 | 12.1423 |
| 1982 | 12.604 |
| 1981 | 13.0109 |
| 1980 | 13.34 |
| 1979 | 13.2686 |
| 1978 | 12.7894 |
| 1977 | 12.234 |
| 1976 | 11.687 |
| 1975 | 11.3398 |
| 1974 | 11.162 |
| 1973 | 10.9641 |
| 1972 | 10.7028 |
| 1971 | 10.4237 |
| 1970 | 10.2529 |
| 1969 | 10.0735 |
| 1968 | 9.80959 |
| 1967 | 9.65078 |
| 1966 | 9.57506 |
| 1965 | 9.51495 |
| 1964 | 9.42822 |
| 1963 | 9.29766 |
| 1962 | 9.12277 |
| 1961 | 8.91613 |
| 1960 | 10.0456 |