| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 1.20847 |
| 2021 | 1.20511 |
| 2020 | 1.19678 |
| 2019 | 1.18508 |
| 2018 | 1.17353 |
| 2017 | 1.16743 |
| 2016 | 1.16083 |
| 2015 | 1.15028 |
| 2014 | 1.14098 |
| 2013 | 1.12936 |
| 2012 | 1.11245 |
| 2011 | 1.09003 |
| 2010 | 1.06182 |
| 2009 | 1.02924 |
| 2008 | 0.995797 |
| 2007 | 0.963002 |
| 2006 | 0.932322 |
| 2005 | 0.900681 |
| 2004 | 0.859799 |
| 2003 | 0.811601 |
| 2002 | 0.763671 |
| 2001 | 0.717098 |
| 2000 | 0.671886 |
| 1999 | 0.626791 |
| 1998 | 0.59546 |
| 1997 | 0.578787 |
| 1996 | 0.562508 |
| 1995 | 0.547401 |
| 1994 | 0.533908 |
| 1993 | 0.521812 |
| 1992 | 0.508977 |
| 1991 | 0.497651 |
| 1990 | 0.487534 |
| 1989 | 0.477796 |
| 1988 | 0.46953 |
| 1987 | 0.462011 |
| 1986 | 0.454682 |
| 1985 | 0.447695 |
| 1984 | 0.441536 |
| 1983 | 0.436107 |
| 1982 | 0.43049 |
| 1981 | 0.425667 |
| 1980 | 0.420781 |
| 1979 | 0.415287 |
| 1978 | 0.409941 |
| 1977 | 0.405805 |
| 1976 | 0.402612 |
| 1975 | 0.399294 |
| 1974 | 0.396781 |
| 1973 | 0.394888 |
| 1972 | 0.393697 |
| 1971 | 0.393291 |
| 1970 | 0.392398 |
| 1969 | 0.390597 |
| 1968 | 0.387738 |
| 1967 | 0.384109 |
| 1966 | 0.38007 |
| 1965 | 0.375612 |
| 1964 | 0.371563 |
| 1963 | 0.369276 |
| 1962 | 0.369 |
| 1961 | 0.369355 |
| 1960 | 0.370358 |