| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 9.06518 |
| 2021 | 9.26328 |
| 2020 | 9.54831 |
| 2019 | 9.91469 |
| 2018 | 10.3445 |
| 2017 | 10.801 |
| 2016 | 11.1751 |
| 2015 | 11.403 |
| 2014 | 11.5065 |
| 2013 | 11.4955 |
| 2012 | 11.3961 |
| 2011 | 11.2637 |
| 2010 | 11.1535 |
| 2009 | 11.0966 |
| 2008 | 11.1131 |
| 2007 | 11.1972 |
| 2006 | 11.3145 |
| 2005 | 11.3553 |
| 2004 | 11.17 |
| 2003 | 10.8066 |
| 2002 | 10.3895 |
| 2001 | 9.95123 |
| 2000 | 9.52997 |
| 1999 | 9.15644 |
| 1998 | 8.90448 |
| 1997 | 8.75759 |
| 1996 | 8.62937 |
| 1995 | 8.51768 |
| 1994 | 8.42182 |
| 1993 | 8.33967 |
| 1992 | 8.26427 |
| 1991 | 8.2053 |
| 1990 | 8.16088 |
| 1989 | 8.11036 |
| 1988 | 8.04996 |
| 1987 | 7.99366 |
| 1986 | 7.94205 |
| 1985 | 7.89855 |
| 1984 | 7.8653 |
| 1983 | 7.84354 |
| 1982 | 7.83721 |
| 1981 | 7.84308 |
| 1980 | 7.85294 |
| 1979 | 7.865 |
| 1978 | 7.87652 |
| 1977 | 7.88683 |
| 1976 | 7.89972 |
| 1975 | 7.91682 |
| 1974 | 8.01836 |
| 1973 | 8.20994 |
| 1972 | 8.47193 |
| 1971 | 8.81472 |
| 1970 | 9.17542 |
| 1969 | 9.43992 |
| 1968 | 9.59811 |
| 1967 | 9.67574 |
| 1966 | 9.65991 |
| 1965 | 9.6288 |
| 1964 | 9.59935 |
| 1963 | 9.58346 |
| 1962 | 9.57779 |
| 1961 | 9.58312 |
| 1960 | 9.59752 |