| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | 4.40603 |
| 2021 | 4.50901 |
| 2020 | 4.68302 |
| 2019 | 4.8621 |
| 2018 | 4.97997 |
| 2017 | 5.06276 |
| 2016 | 5.11841 |
| 2015 | 5.09118 |
| 2014 | 4.97592 |
| 2013 | 4.76151 |
| 2012 | 4.55844 |
| 2011 | 4.36017 |
| 2010 | 4.13908 |
| 2009 | 3.9731 |
| 2008 | 3.85064 |
| 2007 | 3.75095 |
| 2006 | 3.65075 |
| 2005 | 3.57526 |
| 2004 | 3.52006 |
| 2003 | 3.47182 |
| 2002 | 3.43473 |
| 2001 | 3.39901 |
| 2000 | 3.34276 |
| 1999 | 3.27682 |
| 1998 | 3.22136 |
| 1997 | 3.19064 |
| 1996 | 3.19838 |
| 1995 | 3.23878 |
| 1994 | 3.27429 |
| 1993 | 3.28271 |
| 1992 | 3.27275 |
| 1991 | 3.27147 |
| 1990 | 3.29703 |
| 1989 | 3.34472 |
| 1988 | 3.40751 |
| 1987 | 3.4549 |
| 1986 | 3.48815 |
| 1985 | 3.52887 |
| 1984 | 3.56958 |
| 1983 | 3.60616 |
| 1982 | 3.63587 |
| 1981 | 3.66117 |
| 1980 | 3.67956 |
| 1979 | 3.68015 |
| 1978 | 3.67153 |
| 1977 | 3.65542 |
| 1976 | 3.64296 |
| 1975 | 3.6419 |
| 1974 | 3.63793 |
| 1973 | 3.62693 |
| 1972 | 3.61454 |
| 1971 | 3.60117 |
| 1970 | 3.58083 |
| 1969 | 3.5535 |
| 1968 | 3.52292 |
| 1967 | 3.48807 |
| 1966 | 3.44178 |
| 1965 | 3.39447 |
| 1964 | 3.35572 |
| 1963 | 3.31947 |
| 1962 | 3.28528 |
| 1961 | 3.25666 |
| 1960 | 3.23313 |