| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | 6.21295 |
| 2021 | 6.20184 |
| 2020 | 6.18219 |
| 2019 | 6.14718 |
| 2018 | 6.09412 |
| 2017 | 6.03899 |
| 2016 | 6.00714 |
| 2015 | 5.98651 |
| 2014 | 5.97934 |
| 2013 | 5.96093 |
| 2012 | 5.9064 |
| 2011 | 5.82936 |
| 2010 | 5.74111 |
| 2009 | 5.71427 |
| 2008 | 5.72607 |
| 2007 | 5.71141 |
| 2006 | 5.68745 |
| 2005 | 5.65966 |
| 2004 | 5.61141 |
| 2003 | 5.54686 |
| 2002 | 5.48823 |
| 2001 | 5.43894 |
| 2000 | 5.39704 |
| 1999 | 5.35192 |
| 1998 | 5.29785 |
| 1997 | 5.23207 |
| 1996 | 5.13598 |
| 1995 | 5.02418 |
| 1994 | 4.9177 |
| 1993 | 4.81096 |
| 1992 | 4.69925 |
| 1991 | 4.59804 |
| 1990 | 4.50637 |
| 1989 | 4.42267 |
| 1988 | 4.35528 |
| 1987 | 4.27961 |
| 1986 | 4.17398 |
| 1985 | 4.0467 |
| 1984 | 3.91559 |
| 1983 | 3.79507 |
| 1982 | 3.68974 |
| 1981 | 3.59438 |
| 1980 | 3.50747 |
| 1979 | 3.4288 |
| 1978 | 3.35822 |
| 1977 | 3.29692 |
| 1976 | 3.23745 |
| 1975 | 3.17993 |
| 1974 | 3.13072 |
| 1973 | 3.09843 |
| 1972 | 3.08427 |
| 1971 | 3.07152 |
| 1970 | 3.06415 |
| 1969 | 3.06246 |
| 1968 | 3.06425 |
| 1967 | 3.07556 |
| 1966 | 3.0679 |
| 1965 | 3.04557 |
| 1964 | 3.04324 |
| 1963 | 3.04258 |
| 1962 | 3.04531 |
| 1961 | 3.0638 |
| 1960 | 3.09216 |