| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | 2.92634 |
| 2021 | 2.87807 |
| 2020 | 2.81595 |
| 2019 | 2.73715 |
| 2018 | 2.69339 |
| 2017 | 2.69457 |
| 2016 | 2.70655 |
| 2015 | 2.67258 |
| 2014 | 2.61343 |
| 2013 | 2.56909 |
| 2012 | 2.53173 |
| 2011 | 2.54717 |
| 2010 | 2.61378 |
| 2009 | 2.61805 |
| 2008 | 2.57269 |
| 2007 | 2.53307 |
| 2006 | 2.52691 |
| 2005 | 2.55023 |
| 2004 | 2.59026 |
| 2003 | 2.64407 |
| 2002 | 2.67652 |
| 2001 | 2.66332 |
| 2000 | 2.6199 |
| 1999 | 2.57316 |
| 1998 | 2.53431 |
| 1997 | 2.52276 |
| 1996 | 2.54672 |
| 1995 | 2.58021 |
| 1994 | 2.58803 |
| 1993 | 2.56976 |
| 1992 | 2.53733 |
| 1991 | 2.48474 |
| 1990 | 2.42266 |
| 1989 | 2.35702 |
| 1988 | 2.27923 |
| 1987 | 2.20875 |
| 1986 | 2.16472 |
| 1985 | 2.13077 |
| 1984 | 2.1096 |
| 1983 | 2.09503 |
| 1982 | 2.05751 |
| 1981 | 2.00244 |
| 1980 | 1.93641 |
| 1979 | 1.86701 |
| 1978 | 1.80706 |
| 1977 | 1.75167 |
| 1976 | 1.69675 |
| 1975 | 1.64719 |
| 1974 | 1.6131 |
| 1973 | 1.59447 |
| 1972 | 1.58305 |
| 1971 | 1.5847 |
| 1970 | 1.59786 |
| 1969 | 1.61152 |
| 1968 | 1.62596 |
| 1967 | 1.64857 |
| 1966 | 1.66746 |
| 1965 | 1.68192 |
| 1964 | 1.69549 |
| 1963 | 1.70197 |
| 1962 | 1.70338 |
| 1961 | 1.69888 |
| 1960 | 1.6918 |