| 年份 | 不丹  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 4.48002 | 
| 2021 | 4.43855 | 
| 2020 | 4.37182 | 
| 2019 | 4.27078 | 
| 2018 | 4.14808 | 
| 2017 | 4.0242 | 
| 2016 | 3.91909 | 
| 2015 | 3.84228 | 
| 2014 | 3.78997 | 
| 2013 | 3.75517 | 
| 2012 | 3.73025 | 
| 2011 | 3.71084 | 
| 2010 | 3.68851 | 
| 2009 | 3.65313 | 
| 2008 | 3.60038 | 
| 2007 | 3.53069 | 
| 2006 | 3.44959 | 
| 2005 | 3.36561 | 
| 2004 | 3.298 | 
| 2003 | 3.26096 | 
| 2002 | 3.26666 | 
| 2001 | 3.32274 | 
| 2000 | 3.42483 | 
| 1999 | 3.53172 | 
| 1998 | 3.58798 | 
| 1997 | 3.58269 | 
| 1996 | 3.5443 | 
| 1995 | 3.50463 | 
| 1994 | 3.46921 | 
| 1993 | 3.44308 | 
| 1992 | 3.42516 | 
| 1991 | 3.41213 | 
| 1990 | 3.40077 | 
| 1989 | 3.3897 | 
| 1988 | 3.37745 | 
| 1987 | 3.36256 | 
| 1986 | 3.34727 | 
| 1985 | 3.33284 | 
| 1984 | 3.31821 | 
| 1983 | 3.30254 | 
| 1982 | 3.28563 | 
| 1981 | 3.2677 | 
| 1980 | 3.24917 | 
| 1979 | 3.23088 | 
| 1978 | 3.21287 | 
| 1977 | 3.1954 | 
| 1976 | 3.17796 | 
| 1975 | 3.16219 | 
| 1974 | 3.14841 | 
| 1973 | 3.13464 | 
| 1972 | 3.12202 | 
| 1971 | 3.11144 | 
| 1970 | 3.10037 | 
| 1969 | 3.09084 | 
| 1968 | 3.0844 | 
| 1967 | 3.07709 | 
| 1966 | 3.07025 | 
| 1965 | 3.06566 | 
| 1964 | 3.06277 | 
| 1963 | 3.05916 | 
| 1962 | 3.05547 | 
| 1961 | 3.05288 | 
| 1960 | 3.04984 |