| 年份 | 美属维京群岛 |
|---|---|
| 2023 | - |
| 2022 | 2.65397 |
| 2021 | 2.55304 |
| 2020 | 2.47973 |
| 2019 | 2.40905 |
| 2018 | 2.33015 |
| 2017 | 2.26813 |
| 2016 | 2.21709 |
| 2015 | 2.17396 |
| 2014 | 2.12425 |
| 2013 | 2.06132 |
| 2012 | 1.99718 |
| 2011 | 1.93162 |
| 2010 | 1.86746 |
| 2009 | 1.77996 |
| 2008 | 1.67442 |
| 2007 | 1.58844 |
| 2006 | 1.5209 |
| 2005 | 1.47388 |
| 2004 | 1.41627 |
| 2003 | 1.34188 |
| 2002 | 1.2781 |
| 2001 | 1.22512 |
| 2000 | 1.18542 |
| 1999 | 1.14338 |
| 1998 | 1.08882 |
| 1997 | 1.02589 |
| 1996 | 0.96966 |
| 1995 | 0.932669 |
| 1994 | 0.872808 |
| 1993 | 0.783652 |
| 1992 | 0.680472 |
| 1991 | 0.552576 |
| 1990 | 0.472214 |
| 1989 | 0.452229 |
| 1988 | 0.445298 |
| 1987 | 0.444109 |
| 1986 | 0.4435 |
| 1985 | 0.450345 |
| 1984 | 0.465312 |
| 1983 | 0.483457 |
| 1982 | 0.487391 |
| 1981 | 0.476929 |
| 1980 | 0.477162 |
| 1979 | 0.465389 |
| 1978 | 0.432536 |
| 1977 | 0.416843 |
| 1976 | 0.415356 |
| 1975 | 0.421718 |
| 1974 | 0.428904 |
| 1973 | 0.434534 |
| 1972 | 0.447434 |
| 1971 | 0.461016 |
| 1970 | 0.48936 |
| 1969 | 0.55186 |
| 1968 | 0.631171 |
| 1967 | 0.709671 |
| 1966 | 0.79476 |
| 1965 | 0.893563 |
| 1964 | 1.01172 |
| 1963 | 1.15915 |
| 1962 | 1.34958 |
| 1961 | 1.58397 |
| 1960 | 1.32894 |