| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 7.0504 |
| 2021 | 6.8165 |
| 2020 | 6.52688 |
| 2019 | 6.19526 |
| 2018 | 5.86278 |
| 2017 | 5.57847 |
| 2016 | 5.38879 |
| 2015 | 5.28947 |
| 2014 | 5.24114 |
| 2013 | 5.21819 |
| 2012 | 5.19337 |
| 2011 | 5.15263 |
| 2010 | 5.08867 |
| 2009 | 5.00379 |
| 2008 | 4.9126 |
| 2007 | 4.8282 |
| 2006 | 4.75484 |
| 2005 | 4.695 |
| 2004 | 4.64656 |
| 2003 | 4.60448 |
| 2002 | 4.56787 |
| 2001 | 4.53507 |
| 2000 | 4.5008 |
| 1999 | 4.46437 |
| 1998 | 4.43347 |
| 1997 | 4.41018 |
| 1996 | 4.39308 |
| 1995 | 4.37705 |
| 1994 | 4.39837 |
| 1993 | 4.45596 |
| 1992 | 4.55429 |
| 1991 | 4.68747 |
| 1990 | 4.823 |
| 1989 | 4.92219 |
| 1988 | 4.98413 |
| 1987 | 5.01289 |
| 1986 | 5.00108 |
| 1985 | 4.98391 |
| 1984 | 4.97017 |
| 1983 | 4.96669 |
| 1982 | 4.97223 |
| 1981 | 4.98016 |
| 1980 | 4.98793 |
| 1979 | 4.99363 |
| 1978 | 4.99432 |
| 1977 | 4.98903 |
| 1976 | 4.98121 |
| 1975 | 4.97375 |
| 1974 | 4.96438 |
| 1973 | 4.95087 |
| 1972 | 4.93466 |
| 1971 | 4.91597 |
| 1970 | 4.89414 |
| 1969 | 4.87091 |
| 1968 | 4.84617 |
| 1967 | 4.82018 |
| 1966 | 4.79561 |
| 1965 | 4.77284 |
| 1964 | 4.74971 |
| 1963 | 4.72587 |
| 1962 | 4.70287 |
| 1961 | 4.68078 |
| 1960 | 4.65941 |