| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 6.25384 |
| 2021 | 6.13625 |
| 2020 | 6.03206 |
| 2019 | 5.95009 |
| 2018 | 5.89965 |
| 2017 | 5.88312 |
| 2016 | 5.81278 |
| 2015 | 5.67577 |
| 2014 | 5.55233 |
| 2013 | 5.44281 |
| 2012 | 5.34018 |
| 2011 | 5.24028 |
| 2010 | 5.14177 |
| 2009 | 5.04732 |
| 2008 | 4.96015 |
| 2007 | 4.88158 |
| 2006 | 4.81137 |
| 2005 | 4.73412 |
| 2004 | 4.62045 |
| 2003 | 4.47184 |
| 2002 | 4.31001 |
| 2001 | 4.14018 |
| 2000 | 3.96538 |
| 1999 | 3.78737 |
| 1998 | 3.6479 |
| 1997 | 3.55133 |
| 1996 | 3.45846 |
| 1995 | 3.37124 |
| 1994 | 3.28857 |
| 1993 | 3.21021 |
| 1992 | 3.13164 |
| 1991 | 3.06177 |
| 1990 | 2.99798 |
| 1989 | 2.93959 |
| 1988 | 2.88659 |
| 1987 | 2.83702 |
| 1986 | 2.79054 |
| 1985 | 2.7468 |
| 1984 | 2.70597 |
| 1983 | 2.66823 |
| 1982 | 2.63251 |
| 1981 | 2.59961 |
| 1980 | 2.56877 |
| 1979 | 2.54002 |
| 1978 | 2.51406 |
| 1977 | 2.49092 |
| 1976 | 2.46993 |
| 1975 | 2.44954 |
| 1974 | 2.43147 |
| 1973 | 2.41465 |
| 1972 | 2.40107 |
| 1971 | 2.38994 |
| 1970 | 2.3796 |
| 1969 | 2.37127 |
| 1968 | 2.36539 |
| 1967 | 2.36217 |
| 1966 | 2.36029 |
| 1965 | 2.35991 |
| 1964 | 2.36195 |
| 1963 | 2.36403 |
| 1962 | 2.36572 |
| 1961 | 2.37019 |
| 1960 | 2.37701 |