| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | 5.35876 |
| 2021 | 5.39479 |
| 2020 | 5.40577 |
| 2019 | 5.47179 |
| 2018 | 5.46972 |
| 2017 | 5.40734 |
| 2016 | 5.37404 |
| 2015 | 5.33403 |
| 2014 | 5.26034 |
| 2013 | 5.25118 |
| 2012 | 5.27429 |
| 2011 | 5.40213 |
| 2010 | 5.61124 |
| 2009 | 5.78713 |
| 2008 | 5.90449 |
| 2007 | 5.94602 |
| 2006 | 5.96738 |
| 2005 | 5.95876 |
| 2004 | 5.86989 |
| 2003 | 5.69583 |
| 2002 | 5.45706 |
| 2001 | 5.1977 |
| 2000 | 4.94798 |
| 1999 | 4.72912 |
| 1998 | 4.56966 |
| 1997 | 4.45362 |
| 1996 | 4.38969 |
| 1995 | 4.37245 |
| 1994 | 4.35224 |
| 1993 | 4.31066 |
| 1992 | 4.25348 |
| 1991 | 4.18398 |
| 1990 | 4.08504 |
| 1989 | 3.97248 |
| 1988 | 3.88607 |
| 1987 | 3.85616 |
| 1986 | 3.91703 |
| 1985 | 4.02747 |
| 1984 | 4.10928 |
| 1983 | 4.15338 |
| 1982 | 4.17947 |
| 1981 | 4.22778 |
| 1980 | 4.31107 |
| 1979 | 4.41455 |
| 1978 | 4.52795 |
| 1977 | 4.63115 |
| 1976 | 4.69423 |
| 1975 | 4.71673 |
| 1974 | 4.7258 |
| 1973 | 4.74945 |
| 1972 | 4.79101 |
| 1971 | 4.83367 |
| 1970 | 4.87753 |
| 1969 | 4.92322 |
| 1968 | 4.97655 |
| 1967 | 5.03027 |
| 1966 | 5.05564 |
| 1965 | 5.06358 |
| 1964 | 5.07733 |
| 1963 | 5.08252 |
| 1962 | 5.07862 |
| 1961 | 5.06685 |
| 1960 | 5.04571 |