| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 7.62802 |
| 2020 | 5.28737 |
| 2019 | 3.108 |
| 2018 | 1.15086 |
| 2017 | 11.1526 |
| 2016 | 4.38341 |
| 2015 | 3.55707 |
| 2014 | 6.92096 |
| 2013 | 5.86984 |
| 2012 | 9.17993 |
| 2011 | 8.5103 |
| 2010 | 5.85431 |
| 2009 | 4.75629 |
| 2008 | 5.51047 |
| 2007 | 2.95344 |
| 2006 | 5.41986 |
| 2005 | 5.90278 |
| 2004 | 3.70494 |
| 2003 | 3.06615 |
| 2002 | 4.75522 |
| 2001 | 5.35878 |
| 2000 | 7.3502 |
| 1999 | 6.17026 |
| 1998 | 10.6963 |
| 1997 | 12.9069 |
| 1996 | 8.11263 |
| 1995 | 8.28438 |
| 1994 | 12.3413 |
| 1993 | 8.51345 |
| 1992 | 8.92329 |
| 1991 | 8.94128 |
| 1990 | 6.20535 |
| 1989 | 5.60792 |
| 1988 | 14.9649 |
| 1987 | 1.10117 |
| 1986 | 7.18544 |
| 1985 | 6.50861 |
| 1984 | 10.1637 |
| 1983 | 7.15836 |
| 1982 | 7.28715 |
| 1981 | 3.46256 |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |