| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 8.35859 |
| 2021 | 8.10007 |
| 2020 | 7.88849 |
| 2019 | 7.71862 |
| 2018 | 7.56545 |
| 2017 | 7.38875 |
| 2016 | 7.17632 |
| 2015 | 6.92885 |
| 2014 | 6.65823 |
| 2013 | 6.40515 |
| 2012 | 6.20079 |
| 2011 | 6.04895 |
| 2010 | 5.93973 |
| 2009 | 5.86166 |
| 2008 | 5.79578 |
| 2007 | 5.72697 |
| 2006 | 5.65169 |
| 2005 | 5.5797 |
| 2004 | 5.5236 |
| 2003 | 5.47563 |
| 2002 | 5.42534 |
| 2001 | 5.37363 |
| 2000 | 5.32356 |
| 1999 | 5.27642 |
| 1998 | 5.22494 |
| 1997 | 5.17559 |
| 1996 | 5.14122 |
| 1995 | 5.11891 |
| 1994 | 5.10639 |
| 1993 | 5.10333 |
| 1992 | 5.10655 |
| 1991 | 5.1135 |
| 1990 | 5.12565 |
| 1989 | 5.17606 |
| 1988 | 5.2615 |
| 1987 | 5.38246 |
| 1986 | 5.54682 |
| 1985 | 5.71861 |
| 1984 | 5.84856 |
| 1983 | 5.93367 |
| 1982 | 5.97727 |
| 1981 | 5.97134 |
| 1980 | 5.95845 |
| 1979 | 5.94853 |
| 1978 | 5.94833 |
| 1977 | 5.95766 |
| 1976 | 5.9703 |
| 1975 | 5.98107 |
| 1974 | 5.98771 |
| 1973 | 5.98908 |
| 1972 | 5.98288 |
| 1971 | 5.97254 |
| 1970 | 5.96187 |
| 1969 | 5.94848 |
| 1968 | 5.9308 |
| 1967 | 5.90951 |
| 1966 | 5.88475 |
| 1965 | 5.85644 |
| 1964 | 5.82535 |
| 1963 | 5.79224 |
| 1962 | 5.75658 |
| 1961 | 5.71954 |
| 1960 | 5.68584 |