| 年份 | 斯里兰卡 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.0619245 |
| 2020 | 0.0625941 |
| 2019 | 0.0629075 |
| 2018 | 0.0632949 |
| 2017 | 0.0613852 |
| 2016 | 0.0611421 |
| 2015 | 0.0609279 |
| 2014 | 0.0612068 |
| 2013 | 0.0615188 |
| 2012 | 0.0618543 |
| 2011 | 0.062321 |
| 2010 | 0.0580592 |
| 2009 | 0.0585867 |
| 2008 | 0.0591551 |
| 2007 | 0.0498041 |
| 2006 | 0.0528416 |
| 2005 | 0.0559117 |
| 2004 | 0.0461765 |
| 2003 | 0.0492147 |
| 2002 | 0.0489778 |
| 2001 | 0.0484137 |
| 2000 | 0.0487315 |
| 1999 | 0.0484724 |
| 1998 | 0.0478966 |
| 1997 | 0.0481324 |
| 1996 | 0.0484104 |
| 1995 | 0.0487414 |
| 1994 | 0.0490236 |
| 1993 | 0.0493672 |
| 1992 | 0.0513491 |
| 1991 | 0.0518471 |
| 1990 | 0.0523131 |
| 1989 | 0.0530294 |
| 1988 | 0.0535361 |
| 1987 | 0.0540879 |
| 1986 | 0.0543572 |
| 1985 | 0.0544358 |
| 1984 | 0.0549375 |
| 1983 | 0.0554972 |
| 1982 | 0.0555097 |
| 1981 | 0.0592147 |
| 1980 | 0.0602263 |
| 1979 | 0.0613063 |
| 1978 | 0.0693731 |
| 1977 | 0.0670949 |
| 1976 | 0.0647009 |
| 1975 | 0.0622124 |
| 1974 | 0.062154 |
| 1973 | 0.0628714 |
| 1972 | 0.0636496 |
| 1971 | 0.0644822 |
| 1970 | 0.0653818 |
| 1969 | 0.066341 |
| 1968 | 0.0673599 |
| 1967 | 0.0684469 |
| 1966 | 0.0700902 |
| 1965 | 0.0718608 |
| 1964 | 0.0733241 |
| 1963 | 0.0753028 |
| 1962 | 0.0561991 |
| 1961 | 0.0593641 |
| 1960 | - |