| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | 6.35814 |
| 2021 | 6.37021 |
| 2020 | 6.27052 |
| 2019 | 6.17205 |
| 2018 | 6.02191 |
| 2017 | 5.8813 |
| 2016 | 5.81615 |
| 2015 | 5.76522 |
| 2014 | 5.70007 |
| 2013 | 5.67481 |
| 2012 | 5.70269 |
| 2011 | 5.76032 |
| 2010 | 5.86155 |
| 2009 | 5.97725 |
| 2008 | 6.06284 |
| 2007 | 6.11872 |
| 2006 | 6.12559 |
| 2005 | 6.04826 |
| 2004 | 5.88053 |
| 2003 | 5.66364 |
| 2002 | 5.44209 |
| 2001 | 5.26953 |
| 2000 | 5.15953 |
| 1999 | 5.07849 |
| 1998 | 5.00838 |
| 1997 | 4.93526 |
| 1996 | 4.88206 |
| 1995 | 4.8632 |
| 1994 | 4.85892 |
| 1993 | 4.87703 |
| 1992 | 4.89568 |
| 1991 | 4.88959 |
| 1990 | 4.84737 |
| 1989 | 4.78194 |
| 1988 | 4.72989 |
| 1987 | 4.72162 |
| 1986 | 4.76592 |
| 1985 | 4.83231 |
| 1984 | 4.87152 |
| 1983 | 4.86152 |
| 1982 | 4.83829 |
| 1981 | 4.84879 |
| 1980 | 4.88587 |
| 1979 | 4.93281 |
| 1978 | 4.98298 |
| 1977 | 5.01011 |
| 1976 | 5.00162 |
| 1975 | 4.98326 |
| 1974 | 4.98088 |
| 1973 | 5.00311 |
| 1972 | 5.04251 |
| 1971 | 5.0804 |
| 1970 | 5.11481 |
| 1969 | 5.14595 |
| 1968 | 5.16945 |
| 1967 | 5.19061 |
| 1966 | 5.20404 |
| 1965 | 5.20095 |
| 1964 | 5.18461 |
| 1963 | 5.15913 |
| 1962 | 5.12455 |
| 1961 | 5.07888 |
| 1960 | 5.02822 |