| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 8.50309 |
| 2021 | 8.6431 |
| 2020 | 8.85793 |
| 2019 | 9.14082 |
| 2018 | 9.46507 |
| 2017 | 9.78543 |
| 2016 | 10.0068 |
| 2015 | 10.0996 |
| 2014 | 10.1283 |
| 2013 | 10.1436 |
| 2012 | 10.2048 |
| 2011 | 10.355 |
| 2010 | 10.5957 |
| 2009 | 10.9238 |
| 2008 | 11.3316 |
| 2007 | 11.7715 |
| 2006 | 12.1913 |
| 2005 | 12.5755 |
| 2004 | 12.8802 |
| 2003 | 13.0395 |
| 2002 | 13.0491 |
| 2001 | 12.9537 |
| 2000 | 12.7976 |
| 1999 | 12.627 |
| 1998 | 12.5401 |
| 1997 | 12.5242 |
| 1996 | 12.4987 |
| 1995 | 12.4742 |
| 1994 | 12.4494 |
| 1993 | 12.4157 |
| 1992 | 12.3663 |
| 1991 | 12.3069 |
| 1990 | 12.2388 |
| 1989 | 12.1698 |
| 1988 | 12.1044 |
| 1987 | 12.0404 |
| 1986 | 11.9789 |
| 1985 | 11.9193 |
| 1984 | 11.8615 |
| 1983 | 11.8032 |
| 1982 | 11.7414 |
| 1981 | 11.677 |
| 1980 | 11.6112 |
| 1979 | 11.5424 |
| 1978 | 11.4694 |
| 1977 | 11.3924 |
| 1976 | 11.3112 |
| 1975 | 11.2294 |
| 1974 | 11.1505 |
| 1973 | 11.08 |
| 1972 | 11.0202 |
| 1971 | 10.9712 |
| 1970 | 10.9312 |
| 1969 | 10.897 |
| 1968 | 10.8652 |
| 1967 | 10.8322 |
| 1966 | 10.7983 |
| 1965 | 10.7663 |
| 1964 | 10.8316 |
| 1963 | 10.9915 |
| 1962 | 11.2419 |
| 1961 | 11.5991 |
| 1960 | 11.9651 |