| 年份 | 汤加  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 5.42867 | 
| 2021 | 5.37726 | 
| 2020 | 5.32434 | 
| 2019 | 5.26281 | 
| 2018 | 5.23956 | 
| 2017 | 5.26941 | 
| 2016 | 5.29538 | 
| 2015 | 5.36584 | 
| 2014 | 5.47799 | 
| 2013 | 5.54953 | 
| 2012 | 5.55431 | 
| 2011 | 5.54175 | 
| 2010 | 5.47704 | 
| 2009 | 5.28318 | 
| 2008 | 5.07065 | 
| 2007 | 4.88167 | 
| 2006 | 4.73737 | 
| 2005 | 4.65058 | 
| 2004 | 4.59652 | 
| 2003 | 4.55271 | 
| 2002 | 4.50458 | 
| 2001 | 4.43657 | 
| 2000 | 4.36583 | 
| 1999 | 4.31153 | 
| 1998 | 4.29147 | 
| 1997 | 4.298 | 
| 1996 | 4.32211 | 
| 1995 | 4.33902 | 
| 1994 | 4.32459 | 
| 1993 | 4.3071 | 
| 1992 | 4.31274 | 
| 1991 | 4.33549 | 
| 1990 | 4.36304 | 
| 1989 | 4.3735 | 
| 1988 | 4.32609 | 
| 1987 | 4.23898 | 
| 1986 | 4.20651 | 
| 1985 | 4.24484 | 
| 1984 | 4.31328 | 
| 1983 | 4.40061 | 
| 1982 | 4.46668 | 
| 1981 | 4.47945 | 
| 1980 | 4.46166 | 
| 1979 | 4.4372 | 
| 1978 | 4.40757 | 
| 1977 | 4.38237 | 
| 1976 | 4.37588 | 
| 1975 | 4.38738 | 
| 1974 | 4.39339 | 
| 1973 | 4.39046 | 
| 1972 | 4.38444 | 
| 1971 | 4.36583 | 
| 1970 | 4.33908 | 
| 1969 | 4.31111 | 
| 1968 | 4.27864 | 
| 1967 | 4.24262 | 
| 1966 | 4.19839 | 
| 1965 | 4.14511 | 
| 1964 | 4.09153 | 
| 1963 | 4.0427 | 
| 1962 | 4 | 
| 1961 | 3.96306 | 
| 1960 | 3.92673 |