| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 6.97 |
| 2020 | 6.946 |
| 2019 | 6.909 |
| 2018 | 6.888 |
| 2017 | 6.855 |
| 2016 | 6.817 |
| 2015 | 6.782 |
| 2014 | 6.744 |
| 2013 | 6.686 |
| 2012 | 6.636 |
| 2011 | 6.624 |
| 2010 | 6.605 |
| 2009 | 6.684 |
| 2008 | 6.581 |
| 2007 | 6.588 |
| 2006 | 6.627 |
| 2005 | 6.648 |
| 2004 | 6.648 |
| 2003 | 6.68 |
| 2002 | 6.698 |
| 2001 | 6.737 |
| 2000 | 6.759 |
| 1999 | 6.789 |
| 1998 | 6.819 |
| 1997 | 6.838 |
| 1996 | 6.837 |
| 1995 | 6.827 |
| 1994 | 6.819 |
| 1993 | 6.813 |
| 1992 | 6.811 |
| 1991 | 6.811 |
| 1990 | 6.842 |
| 1989 | 6.841 |
| 1988 | 6.848 |
| 1987 | 6.866 |
| 1986 | 6.828 |
| 1985 | 6.784 |
| 1984 | 6.746 |
| 1983 | 6.696 |
| 1982 | 6.729 |
| 1981 | 6.604 |
| 1980 | 6.585 |
| 1979 | 6.573 |
| 1978 | 6.575 |
| 1977 | 6.611 |
| 1976 | 6.6 |
| 1975 | 6.645 |
| 1974 | 6.691 |
| 1973 | 6.835 |
| 1972 | 6.951 |
| 1971 | 7.122 |
| 1970 | 7.367 |
| 1969 | 7.672 |
| 1968 | 8.029 |
| 1967 | 8.388 |
| 1966 | 8.678 |
| 1965 | 9.03 |
| 1964 | 9.382 |
| 1963 | 9.725 |
| 1962 | 10.061 |
| 1961 | 10.426 |
| 1960 | 10.716 |