| 年份 | 美属维京群岛 |
|---|---|
| 2023 | - |
| 2022 | 3.85316 |
| 2021 | 3.76226 |
| 2020 | 3.64479 |
| 2019 | 3.48712 |
| 2018 | 3.29399 |
| 2017 | 3.093 |
| 2016 | 2.89088 |
| 2015 | 2.70185 |
| 2014 | 2.5426 |
| 2013 | 2.40588 |
| 2012 | 2.28506 |
| 2011 | 2.18064 |
| 2010 | 2.08524 |
| 2009 | 1.99203 |
| 2008 | 1.90297 |
| 2007 | 1.82474 |
| 2006 | 1.75722 |
| 2005 | 1.69074 |
| 2004 | 1.60922 |
| 2003 | 1.51644 |
| 2002 | 1.42292 |
| 2001 | 1.33279 |
| 2000 | 1.26187 |
| 1999 | 1.22089 |
| 1998 | 1.19419 |
| 1997 | 1.18916 |
| 1996 | 1.18701 |
| 1995 | 1.15907 |
| 1994 | 1.13183 |
| 1993 | 1.09913 |
| 1992 | 1.04508 |
| 1991 | 0.989948 |
| 1990 | 0.954649 |
| 1989 | 0.916737 |
| 1988 | 0.865063 |
| 1987 | 0.806731 |
| 1986 | 0.758832 |
| 1985 | 0.725442 |
| 1984 | 0.686694 |
| 1983 | 0.658412 |
| 1982 | 0.649854 |
| 1981 | 0.654317 |
| 1980 | 0.655288 |
| 1979 | 0.64668 |
| 1978 | 0.634006 |
| 1977 | 0.607064 |
| 1976 | 0.569596 |
| 1975 | 0.546345 |
| 1974 | 0.533515 |
| 1973 | 0.520351 |
| 1972 | 0.511556 |
| 1971 | 0.504423 |
| 1970 | 0.519353 |
| 1969 | 0.58187 |
| 1968 | 0.671721 |
| 1967 | 0.758356 |
| 1966 | 0.85267 |
| 1965 | 0.955557 |
| 1964 | 1.05292 |
| 1963 | 1.15181 |
| 1962 | 1.25804 |
| 1961 | 1.37128 |
| 1960 | 1.31082 |