| 年份 | 斯里兰卡 |
|---|---|
| 2023 | - |
| 2022 | 1.65851 |
| 2021 | 1.57046 |
| 2020 | 1.49538 |
| 2019 | 1.42326 |
| 2018 | 1.359 |
| 2017 | 1.30379 |
| 2016 | 1.26548 |
| 2015 | 1.23808 |
| 2014 | 1.21122 |
| 2013 | 1.19878 |
| 2012 | 1.18725 |
| 2011 | 1.16902 |
| 2010 | 1.16597 |
| 2009 | 1.17202 |
| 2008 | 1.17239 |
| 2007 | 1.17661 |
| 2006 | 1.18587 |
| 2005 | 1.198 |
| 2004 | 1.20986 |
| 2003 | 1.22124 |
| 2002 | 1.22969 |
| 2001 | 1.23832 |
| 2000 | 1.2491 |
| 1999 | 1.251 |
| 1998 | 1.24331 |
| 1997 | 1.23462 |
| 1996 | 1.22352 |
| 1995 | 1.21015 |
| 1994 | 1.19454 |
| 1993 | 1.17679 |
| 1992 | 1.15813 |
| 1991 | 1.13971 |
| 1990 | 1.12053 |
| 1989 | 1.10105 |
| 1988 | 1.08019 |
| 1987 | 1.05668 |
| 1986 | 1.03165 |
| 1985 | 1.00599 |
| 1984 | 0.980212 |
| 1983 | 0.955553 |
| 1982 | 0.932844 |
| 1981 | 0.910078 |
| 1980 | 0.885823 |
| 1979 | 0.860356 |
| 1978 | 0.832328 |
| 1977 | 0.803924 |
| 1976 | 0.779439 |
| 1975 | 0.759454 |
| 1974 | 0.744477 |
| 1973 | 0.735373 |
| 1972 | 0.731528 |
| 1971 | 0.727937 |
| 1970 | 0.725026 |
| 1969 | 0.727723 |
| 1968 | 0.73365 |
| 1967 | 0.740658 |
| 1966 | 0.751933 |
| 1965 | 0.77047 |
| 1964 | 0.796855 |
| 1963 | 0.830693 |
| 1962 | 0.872497 |
| 1961 | 0.923243 |
| 1960 | 0.984555 |