| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.0407525 |
| 2020 | 0.0390441 |
| 2019 | 0.035554 |
| 2018 | 0.0399576 |
| 2017 | 0.0540904 |
| 2016 | 0.0453861 |
| 2015 | 0.042139 |
| 2014 | 0.0521558 |
| 2013 | 0.0401189 |
| 2012 | 0.0398684 |
| 2011 | 0.047842 |
| 2010 | 0.0485079 |
| 2009 | 0.05494 |
| 2008 | 0.0556292 |
| 2007 | 0.0481607 |
| 2006 | 0.0365613 |
| 2005 | 0.0240156 |
| 2004 | 0.0314038 |
| 2003 | 0.0416732 |
| 2002 | 0.0356625 |
| 2001 | 0.0334836 |
| 2000 | 0.0280007 |
| 1999 | 0.0294184 |
| 1998 | 0.0547914 |
| 1997 | 0.0487477 |
| 1996 | 0.0635689 |
| 1995 | 0.0663063 |
| 1994 | 0.0583899 |
| 1993 | 0.0783018 |
| 1992 | 0.0738748 |
| 1991 | 0.0709411 |
| 1990 | 0.0790821 |
| 1989 | 0.150968 |
| 1988 | 0.136672 |
| 1987 | 0.182378 |
| 1986 | 0.202478 |
| 1985 | 0.200602 |
| 1984 | 0.109551 |
| 1983 | 0.15919 |
| 1982 | 0.403824 |
| 1981 | 0.0248156 |
| 1980 | 0.0480589 |
| 1979 | 0.0509804 |
| 1978 | 0.0386457 |
| 1977 | 0.0583037 |
| 1976 | 0.0470037 |
| 1975 | 0.040334 |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |