| 年份 | 不丹  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | - | 
| 2021 | 2.65822 | 
| 2020 | 2.73962 | 
| 2019 | 2.08647 | 
| 2018 | 1.91885 | 
| 2017 | 3.30997 | 
| 2016 | 4.39117 | 
| 2015 | 3.96389 | 
| 2014 | 3.35183 | 
| 2013 | 3.34979 | 
| 2012 | 4.01237 | 
| 2011 | 4.62122 | 
| 2010 | 5.03484 | 
| 2009 | 3.40999 | 
| 2008 | 3.53319 | 
| 2007 | 4.02107 | 
| 2006 | 3.11249 | 
| 2005 | 2.43703 | 
| 2004 | 2.85285 | 
| 2003 | 3.23005 | 
| 2002 | 3.42644 | 
| 2001 | 3.63264 | 
| 2000 | 3.89917 | 
| 1999 | 4.21097 | 
| 1998 | 4.08478 | 
| 1997 | 4.13723 | 
| 1996 | 5.60363 | 
| 1995 | 5.83675 | 
| 1994 | 5.1698 | 
| 1993 | 6.37378 | 
| 1992 | 7.69837 | 
| 1991 | 7.56378 | 
| 1990 | 6.25372 | 
| 1989 | 5.75667 | 
| 1988 | 5.74605 | 
| 1987 | 6.14712 | 
| 1986 | 8.46831 | 
| 1985 | 5.90831 | 
| 1984 | 8.61777 | 
| 1983 | 10.6648 | 
| 1982 | 17.2861 | 
| 1981 | 11.7037 | 
| 1980 | 14.4055 | 
| 1979 | - | 
| 1978 | - | 
| 1977 | - | 
| 1976 | - | 
| 1975 | - | 
| 1974 | - | 
| 1973 | - | 
| 1972 | - | 
| 1971 | - | 
| 1970 | - | 
| 1969 | - | 
| 1968 | - | 
| 1967 | - | 
| 1966 | - | 
| 1965 | - | 
| 1964 | - | 
| 1963 | - | 
| 1962 | - | 
| 1961 | - | 
| 1960 | - |