| 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 | - |