| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | 9.03251 |
| 2021 | 8.77487 |
| 2020 | 8.51466 |
| 2019 | 8.32211 |
| 2018 | 8.26736 |
| 2017 | 8.32339 |
| 2016 | 8.37325 |
| 2015 | 8.39554 |
| 2014 | 8.40397 |
| 2013 | 8.32447 |
| 2012 | 8.15808 |
| 2011 | 8.12585 |
| 2010 | 8.30682 |
| 2009 | 8.53361 |
| 2008 | 8.74346 |
| 2007 | 8.89497 |
| 2006 | 8.98725 |
| 2005 | 9.06031 |
| 2004 | 9.14052 |
| 2003 | 9.22896 |
| 2002 | 9.29209 |
| 2001 | 9.29388 |
| 2000 | 9.25541 |
| 1999 | 9.19593 |
| 1998 | 9.13738 |
| 1997 | 9.12684 |
| 1996 | 9.24217 |
| 1995 | 9.50592 |
| 1994 | 9.85443 |
| 1993 | 10.2221 |
| 1992 | 10.5687 |
| 1991 | 10.8176 |
| 1990 | 10.8921 |
| 1989 | 10.7644 |
| 1988 | 10.4376 |
| 1987 | 9.95632 |
| 1986 | 9.48951 |
| 1985 | 9.19969 |
| 1984 | 9.0703 |
| 1983 | 9.03572 |
| 1982 | 9.03033 |
| 1981 | 9.00088 |
| 1980 | 8.92624 |
| 1979 | 8.80071 |
| 1978 | 8.61804 |
| 1977 | 8.3874 |
| 1976 | 8.20051 |
| 1975 | 8.08732 |
| 1974 | 7.99156 |
| 1973 | 7.88562 |
| 1972 | 7.76711 |
| 1971 | 7.70951 |
| 1970 | 7.72959 |
| 1969 | 7.78729 |
| 1968 | 7.87566 |
| 1967 | 8.00546 |
| 1966 | 8.09121 |
| 1965 | 8.11297 |
| 1964 | 8.16027 |
| 1963 | 8.23244 |
| 1962 | 8.32026 |
| 1961 | 8.40776 |
| 1960 | 8.49149 |