| 年份 | 斯里兰卡 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 1.99 |
| 2020 | 2 |
| 2019 | 2.019 |
| 2018 | 2.031 |
| 2017 | 2.053 |
| 2016 | 2.068 |
| 2015 | 2.091 |
| 2014 | 2.13 |
| 2013 | 2.181 |
| 2012 | 2.196 |
| 2011 | 2.206 |
| 2010 | 2.196 |
| 2009 | 2.224 |
| 2008 | 2.275 |
| 2007 | 2.327 |
| 2006 | 2.344 |
| 2005 | 2.283 |
| 2004 | 2.267 |
| 2003 | 2.276 |
| 2002 | 2.275 |
| 2001 | 2.261 |
| 2000 | 2.191 |
| 1999 | 2.138 |
| 1998 | 2.116 |
| 1997 | 2.182 |
| 1996 | 2.238 |
| 1995 | 2.295 |
| 1994 | 2.343 |
| 1993 | 2.406 |
| 1992 | 2.483 |
| 1991 | 2.5 |
| 1990 | 2.517 |
| 1989 | 2.558 |
| 1988 | 2.565 |
| 1987 | 2.657 |
| 1986 | 2.744 |
| 1985 | 2.879 |
| 1984 | 2.988 |
| 1983 | 3.093 |
| 1982 | 3.298 |
| 1981 | 3.576 |
| 1980 | 3.643 |
| 1979 | 3.74 |
| 1978 | 3.724 |
| 1977 | 3.676 |
| 1976 | 3.746 |
| 1975 | 3.792 |
| 1974 | 3.848 |
| 1973 | 4.033 |
| 1972 | 4.147 |
| 1971 | 4.242 |
| 1970 | 4.361 |
| 1969 | 4.5 |
| 1968 | 4.682 |
| 1967 | 4.855 |
| 1966 | 4.884 |
| 1965 | 5.004 |
| 1964 | 5.135 |
| 1963 | 5.211 |
| 1962 | 5.261 |
| 1961 | 5.331 |
| 1960 | 5.465 |