| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 9.47276 |
| 2021 | 9.45197 |
| 2020 | 9.47663 |
| 2019 | 9.56845 |
| 2018 | 9.73475 |
| 2017 | 9.972 |
| 2016 | 10.2773 |
| 2015 | 10.6041 |
| 2014 | 10.9004 |
| 2013 | 11.1395 |
| 2012 | 11.2764 |
| 2011 | 11.2973 |
| 2010 | 11.2157 |
| 2009 | 11.0465 |
| 2008 | 10.8394 |
| 2007 | 10.6492 |
| 2006 | 10.4829 |
| 2005 | 10.3059 |
| 2004 | 10.094 |
| 2003 | 9.88306 |
| 2002 | 9.70603 |
| 2001 | 9.55998 |
| 2000 | 9.43804 |
| 1999 | 9.33539 |
| 1998 | 9.2185 |
| 1997 | 9.08458 |
| 1996 | 8.96447 |
| 1995 | 8.8585 |
| 1994 | 8.76625 |
| 1993 | 8.68315 |
| 1992 | 8.60265 |
| 1991 | 8.53481 |
| 1990 | 8.47614 |
| 1989 | 8.41367 |
| 1988 | 8.34577 |
| 1987 | 8.27954 |
| 1986 | 8.21575 |
| 1985 | 8.15822 |
| 1984 | 8.1082 |
| 1983 | 8.06843 |
| 1982 | 8.04167 |
| 1981 | 8.02621 |
| 1980 | 8.01634 |
| 1979 | 8.01033 |
| 1978 | 8.00559 |
| 1977 | 8.00035 |
| 1976 | 7.99778 |
| 1975 | 7.99898 |
| 1974 | 8.06789 |
| 1973 | 8.20274 |
| 1972 | 8.39985 |
| 1971 | 8.67511 |
| 1970 | 8.96396 |
| 1969 | 9.17397 |
| 1968 | 9.30237 |
| 1967 | 9.35535 |
| 1966 | 9.31647 |
| 1965 | 9.26468 |
| 1964 | 9.2198 |
| 1963 | 9.19476 |
| 1962 | 9.18682 |
| 1961 | 9.19056 |
| 1960 | 9.19863 |