| 年份 | 汤加 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 11.1 |
| 2020 | 11.4 |
| 2019 | 11.7 |
| 2018 | 11.9 |
| 2017 | 12.1 |
| 2016 | 12.2 |
| 2015 | 12.4 |
| 2014 | 12.5 |
| 2013 | 12.6 |
| 2012 | 12.8 |
| 2011 | 12.9 |
| 2010 | 13.2 |
| 2009 | 13.4 |
| 2008 | 13.7 |
| 2007 | 14 |
| 2006 | 14.4 |
| 2005 | 14.8 |
| 2004 | 15.1 |
| 2003 | 15.6 |
| 2002 | 16 |
| 2001 | 16.5 |
| 2000 | 17 |
| 1999 | 17.4 |
| 1998 | 17.8 |
| 1997 | 18.1 |
| 1996 | 18.5 |
| 1995 | 18.9 |
| 1994 | 19.4 |
| 1993 | 20 |
| 1992 | 20.6 |
| 1991 | 21.4 |
| 1990 | 22.2 |
| 1989 | 23 |
| 1988 | 23.8 |
| 1987 | 24.5 |
| 1986 | 25.2 |
| 1985 | 25.8 |
| 1984 | 26.4 |
| 1983 | 27.1 |
| 1982 | 27.8 |
| 1981 | 28.7 |
| 1980 | 29.6 |
| 1979 | 30.8 |
| 1978 | 32.2 |
| 1977 | 33.7 |
| 1976 | 35.3 |
| 1975 | 37 |
| 1974 | 38.9 |
| 1973 | 41.1 |
| 1972 | 43.5 |
| 1971 | 46.3 |
| 1970 | 49.4 |
| 1969 | 52.8 |
| 1968 | 56.6 |
| 1967 | 60.6 |
| 1966 | 64.9 |
| 1965 | 69.2 |
| 1964 | 73.8 |
| 1963 | 78.8 |
| 1962 | - |
| 1961 | - |
| 1960 | - |