| 年份 | 汤加  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 4.94342 | 
| 2021 | 4.92949 | 
| 2020 | 4.89034 | 
| 2019 | 4.81883 | 
| 2018 | 4.81224 | 
| 2017 | 4.83368 | 
| 2016 | 4.91409 | 
| 2015 | 5.07796 | 
| 2014 | 5.2594 | 
| 2013 | 5.39109 | 
| 2012 | 5.46623 | 
| 2011 | 5.49459 | 
| 2010 | 5.45497 | 
| 2009 | 5.33663 | 
| 2008 | 5.1425 | 
| 2007 | 4.92387 | 
| 2006 | 4.71861 | 
| 2005 | 4.51523 | 
| 2004 | 4.33115 | 
| 2003 | 4.19807 | 
| 2002 | 4.09683 | 
| 2001 | 3.99794 | 
| 2000 | 3.91331 | 
| 1999 | 3.84868 | 
| 1998 | 3.78493 | 
| 1997 | 3.72843 | 
| 1996 | 3.69354 | 
| 1995 | 3.65075 | 
| 1994 | 3.58989 | 
| 1993 | 3.53797 | 
| 1992 | 3.51595 | 
| 1991 | 3.53347 | 
| 1990 | 3.57304 | 
| 1989 | 3.60787 | 
| 1988 | 3.61852 | 
| 1987 | 3.60524 | 
| 1986 | 3.62873 | 
| 1985 | 3.70694 | 
| 1984 | 3.80843 | 
| 1983 | 3.92292 | 
| 1982 | 4.02329 | 
| 1981 | 4.0879 | 
| 1980 | 4.12456 | 
| 1979 | 4.14473 | 
| 1978 | 4.148 | 
| 1977 | 4.14125 | 
| 1976 | 4.14342 | 
| 1975 | 4.16054 | 
| 1974 | 4.1808 | 
| 1973 | 4.20703 | 
| 1972 | 4.23006 | 
| 1971 | 4.24566 | 
| 1970 | 4.26235 | 
| 1969 | 4.27952 | 
| 1968 | 4.29105 | 
| 1967 | 4.30369 | 
| 1966 | 4.29431 | 
| 1965 | 4.2584 | 
| 1964 | 4.22425 | 
| 1963 | 4.18974 | 
| 1962 | 4.15263 | 
| 1961 | 4.10768 | 
| 1960 | 4.06492 |