| 年份 | 美属维京群岛 |
|---|---|
| 2023 | - |
| 2022 | 4.9218 |
| 2021 | 4.65618 |
| 2020 | 4.38293 |
| 2019 | 4.10169 |
| 2018 | 3.82273 |
| 2017 | 3.55749 |
| 2016 | 3.30771 |
| 2015 | 3.08644 |
| 2014 | 2.9044 |
| 2013 | 2.75035 |
| 2012 | 2.60993 |
| 2011 | 2.48268 |
| 2010 | 2.3554 |
| 2009 | 2.23447 |
| 2008 | 2.12758 |
| 2007 | 2.02835 |
| 2006 | 1.93877 |
| 2005 | 1.86396 |
| 2004 | 1.80721 |
| 2003 | 1.76734 |
| 2002 | 1.73857 |
| 2001 | 1.71095 |
| 2000 | 1.67653 |
| 1999 | 1.6336 |
| 1998 | 1.58305 |
| 1997 | 1.52136 |
| 1996 | 1.46629 |
| 1995 | 1.41008 |
| 1994 | 1.36147 |
| 1993 | 1.32837 |
| 1992 | 1.29148 |
| 1991 | 1.247 |
| 1990 | 1.20541 |
| 1989 | 1.15564 |
| 1988 | 1.08807 |
| 1987 | 1.03151 |
| 1986 | 0.985567 |
| 1985 | 0.943432 |
| 1984 | 0.898215 |
| 1983 | 0.873759 |
| 1982 | 0.868548 |
| 1981 | 0.851622 |
| 1980 | 0.830609 |
| 1979 | 0.810113 |
| 1978 | 0.78781 |
| 1977 | 0.771958 |
| 1976 | 0.761325 |
| 1975 | 0.757503 |
| 1974 | 0.763474 |
| 1973 | 0.765336 |
| 1972 | 0.766642 |
| 1971 | 0.771319 |
| 1970 | 0.796311 |
| 1969 | 0.832723 |
| 1968 | 0.845943 |
| 1967 | 0.850517 |
| 1966 | 0.855602 |
| 1965 | 0.85177 |
| 1964 | 0.865292 |
| 1963 | 0.918496 |
| 1962 | 0.981855 |
| 1961 | 1.0507 |
| 1960 | 1.33378 |