| 年份 | 美属维京群岛 |
|---|---|
| 2023 | - |
| 2022 | 19.1796 |
| 2021 | 19.243 |
| 2020 | 19.2643 |
| 2019 | 19.2801 |
| 2018 | 19.3455 |
| 2017 | 19.3847 |
| 2016 | 19.4228 |
| 2015 | 19.4843 |
| 2014 | 19.584 |
| 2013 | 19.7481 |
| 2012 | 19.9947 |
| 2011 | 20.3134 |
| 2010 | 20.6765 |
| 2009 | 21.0394 |
| 2008 | 21.4417 |
| 2007 | 21.9362 |
| 2006 | 22.5105 |
| 2005 | 23.1586 |
| 2004 | 23.8348 |
| 2003 | 24.5158 |
| 2002 | 25.1853 |
| 2001 | 25.8115 |
| 2000 | 26.3586 |
| 1999 | 26.9956 |
| 1998 | 27.7687 |
| 1997 | 28.5059 |
| 1996 | 29.2064 |
| 1995 | 29.9647 |
| 1994 | 30.4318 |
| 1993 | 30.4335 |
| 1992 | 30.3388 |
| 1991 | 30.2612 |
| 1990 | 30.2711 |
| 1989 | 30.3772 |
| 1988 | 30.5922 |
| 1987 | 30.9825 |
| 1986 | 31.5426 |
| 1985 | 32.2203 |
| 1984 | 32.9067 |
| 1983 | 33.5288 |
| 1982 | 34.1947 |
| 1981 | 34.9976 |
| 1980 | 35.8728 |
| 1979 | 36.8032 |
| 1978 | 37.646 |
| 1977 | 38.1316 |
| 1976 | 38.2549 |
| 1975 | 38.1849 |
| 1974 | 38.1308 |
| 1973 | 38.0465 |
| 1972 | 37.7074 |
| 1971 | 37.0889 |
| 1970 | 36.3201 |
| 1969 | 36.1464 |
| 1968 | 36.5264 |
| 1967 | 36.712 |
| 1966 | 36.7072 |
| 1965 | 36.4961 |
| 1964 | 36.2191 |
| 1963 | 36.0547 |
| 1962 | 35.896 |
| 1961 | 35.6392 |
| 1960 | 37.5439 |