| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 6.05694 |
| 2021 | 6.31552 |
| 2020 | 6.60039 |
| 2019 | 6.91741 |
| 2018 | 7.28321 |
| 2017 | 7.6375 |
| 2016 | 7.9391 |
| 2015 | 8.20133 |
| 2014 | 8.41813 |
| 2013 | 8.57308 |
| 2012 | 8.71346 |
| 2011 | 8.88341 |
| 2010 | 9.09156 |
| 2009 | 9.29779 |
| 2008 | 9.46984 |
| 2007 | 9.60015 |
| 2006 | 9.69845 |
| 2005 | 9.86304 |
| 2004 | 10.2066 |
| 2003 | 10.6624 |
| 2002 | 11.1538 |
| 2001 | 11.6953 |
| 2000 | 12.2705 |
| 1999 | 12.8847 |
| 1998 | 13.4282 |
| 1997 | 13.8495 |
| 1996 | 14.2293 |
| 1995 | 14.5648 |
| 1994 | 14.8635 |
| 1993 | 15.1237 |
| 1992 | 15.3596 |
| 1991 | 15.5502 |
| 1990 | 15.6966 |
| 1989 | 15.8268 |
| 1988 | 15.956 |
| 1987 | 16.0737 |
| 1986 | 16.1806 |
| 1985 | 16.2798 |
| 1984 | 16.3706 |
| 1983 | 16.4472 |
| 1982 | 16.507 |
| 1981 | 16.5494 |
| 1980 | 16.5786 |
| 1979 | 16.5974 |
| 1978 | 16.6132 |
| 1977 | 16.6287 |
| 1976 | 16.6398 |
| 1975 | 16.6484 |
| 1974 | 16.6574 |
| 1973 | 16.6609 |
| 1972 | 16.6536 |
| 1971 | 16.6396 |
| 1970 | 16.6193 |
| 1969 | 16.5886 |
| 1968 | 16.5465 |
| 1967 | 16.49 |
| 1966 | 16.4201 |
| 1965 | 16.3428 |
| 1964 | 16.2622 |
| 1963 | 16.1838 |
| 1962 | 16.1154 |
| 1961 | 16.0416 |
| 1960 | 15.9521 |