| 年份 | 斯里兰卡 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 3.9 |
| 2020 | 4 |
| 2019 | 4.1 |
| 2018 | 4.3 |
| 2017 | 4.5 |
| 2016 | 4.8 |
| 2015 | 5.1 |
| 2014 | 5.5 |
| 2013 | 5.9 |
| 2012 | 6.1 |
| 2011 | 6.2 |
| 2010 | 6.3 |
| 2009 | 6.7 |
| 2008 | 6.7 |
| 2007 | 6.7 |
| 2006 | 6.7 |
| 2005 | 6.9 |
| 2004 | 7.6 |
| 2003 | 7.9 |
| 2002 | 8.5 |
| 2001 | 9.1 |
| 2000 | 9.8 |
| 1999 | 10.5 |
| 1998 | 11.2 |
| 1997 | 11.8 |
| 1996 | 12.3 |
| 1995 | 12.5 |
| 1994 | 12.6 |
| 1993 | 12.6 |
| 1992 | 12.7 |
| 1991 | 13.1 |
| 1990 | 13.9 |
| 1989 | 14.8 |
| 1988 | 15.6 |
| 1987 | 16.3 |
| 1986 | 16.8 |
| 1985 | 16.8 |
| 1984 | 16.6 |
| 1983 | 16.9 |
| 1982 | 18.4 |
| 1981 | 21 |
| 1980 | 23.3 |
| 1979 | 24.3 |
| 1978 | 24.5 |
| 1977 | 24.8 |
| 1976 | 25.5 |
| 1975 | 26.5 |
| 1974 | 27.7 |
| 1973 | 28.9 |
| 1972 | 30 |
| 1971 | 31 |
| 1970 | 31.9 |
| 1969 | 32.8 |
| 1968 | 33.7 |
| 1967 | 34.8 |
| 1966 | 35.9 |
| 1965 | 36.9 |
| 1964 | 37.7 |
| 1963 | 38.3 |
| 1962 | 38.8 |
| 1961 | 39.4 |
| 1960 | 40.1 |