| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 2.4646 |
| 2020 | 2.4646 |
| 2019 | 2.4646 |
| 2018 | 2.4646 |
| 2017 | 2.47745 |
| 2016 | 2.62164 |
| 2015 | 2.62875 |
| 2014 | 2.62875 |
| 2013 | 2.62875 |
| 2012 | 2.62875 |
| 2011 | 2.62875 |
| 2010 | 2.63924 |
| 2009 | 2.6235 |
| 2008 | 2.6235 |
| 2007 | 3.57583 |
| 2006 | 3.96936 |
| 2005 | 4.38125 |
| 2004 | 4.14513 |
| 2003 | 3.94472 |
| 2002 | 3.9196 |
| 2001 | 3.89447 |
| 2000 | 3.86935 |
| 1999 | 3.84422 |
| 1998 | 3.84422 |
| 1997 | 3.84422 |
| 1996 | 3.79397 |
| 1995 | 3.66834 |
| 1994 | 3.51759 |
| 1993 | 2.91077 |
| 1992 | 2.88937 |
| 1991 | 2.88937 |
| 1990 | 2.88937 |
| 1989 | 2.84656 |
| 1988 | 3.01779 |
| 1987 | 3.1248 |
| 1986 | 3.1034 |
| 1985 | 3.1034 |
| 1984 | 3.1034 |
| 1983 | 3.1034 |
| 1982 | 2.88937 |
| 1981 | 2.78236 |
| 1980 | 2.78236 |
| 1979 | 2.67534 |
| 1978 | 2.56833 |
| 1977 | 2.56833 |
| 1976 | 2.56833 |
| 1975 | 2.46131 |
| 1974 | 2.46131 |
| 1973 | 2.3543 |
| 1972 | 2.3543 |
| 1971 | 2.3543 |
| 1970 | 2.3543 |
| 1969 | 2.14027 |
| 1968 | 2.14027 |
| 1967 | 2.14027 |
| 1966 | 2.14027 |
| 1965 | 2.14027 |
| 1964 | 2.14027 |
| 1963 | 2.14027 |
| 1962 | 2.14027 |
| 1961 | 2.14027 |
| 1960 | - |