| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | 2.71439 |
| 2021 | 2.66593 |
| 2020 | 2.62034 |
| 2019 | 2.58107 |
| 2018 | 2.57624 |
| 2017 | 2.56192 |
| 2016 | 2.52689 |
| 2015 | 2.48984 |
| 2014 | 2.42554 |
| 2013 | 2.34671 |
| 2012 | 2.31538 |
| 2011 | 2.33633 |
| 2010 | 2.37747 |
| 2009 | 2.37276 |
| 2008 | 2.31833 |
| 2007 | 2.25704 |
| 2006 | 2.22942 |
| 2005 | 2.24549 |
| 2004 | 2.29732 |
| 2003 | 2.38717 |
| 2002 | 2.471 |
| 2001 | 2.51016 |
| 2000 | 2.51139 |
| 1999 | 2.49185 |
| 1998 | 2.46379 |
| 1997 | 2.45081 |
| 1996 | 2.46203 |
| 1995 | 2.48169 |
| 1994 | 2.4932 |
| 1993 | 2.49419 |
| 1992 | 2.4826 |
| 1991 | 2.43766 |
| 1990 | 2.36802 |
| 1989 | 2.29409 |
| 1988 | 2.22119 |
| 1987 | 2.18204 |
| 1986 | 2.20149 |
| 1985 | 2.23862 |
| 1984 | 2.25538 |
| 1983 | 2.23659 |
| 1982 | 2.17442 |
| 1981 | 2.08804 |
| 1980 | 1.99791 |
| 1979 | 1.91615 |
| 1978 | 1.84288 |
| 1977 | 1.77729 |
| 1976 | 1.7367 |
| 1975 | 1.71764 |
| 1974 | 1.6912 |
| 1973 | 1.66064 |
| 1972 | 1.63484 |
| 1971 | 1.61233 |
| 1970 | 1.60035 |
| 1969 | 1.5961 |
| 1968 | 1.59329 |
| 1967 | 1.59563 |
| 1966 | 1.59927 |
| 1965 | 1.60909 |
| 1964 | 1.62382 |
| 1963 | 1.63722 |
| 1962 | 1.64605 |
| 1961 | 1.64729 |
| 1960 | 1.64188 |