| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | 0.637078 |
| 2021 | 0.642586 |
| 2020 | 0.655472 |
| 2019 | 0.701253 |
| 2018 | 0.787112 |
| 2017 | 0.844693 |
| 2016 | 0.868974 |
| 2015 | 0.93497 |
| 2014 | 1.01936 |
| 2013 | 1.06812 |
| 2012 | 1.08947 |
| 2011 | 1.10161 |
| 2010 | 1.11718 |
| 2009 | 1.14473 |
| 2008 | 1.18468 |
| 2007 | 1.23319 |
| 2006 | 1.48695 |
| 2005 | 2.03035 |
| 2004 | 2.39211 |
| 2003 | 2.48546 |
| 2002 | 2.58776 |
| 2001 | 2.69278 |
| 2000 | 2.80057 |
| 1999 | 2.45498 |
| 1998 | 1.862 |
| 1997 | 1.72844 |
| 1996 | 1.87005 |
| 1995 | 1.19682 |
| 1994 | 0.0809905 |
| 1993 | -4.70774 |
| 1992 | -3.90943 |
| 1991 | 1.646 |
| 1990 | 2.58174 |
| 1989 | 2.82485 |
| 1988 | 2.8811 |
| 1987 | 2.93652 |
| 1986 | 2.97334 |
| 1985 | 3.00915 |
| 1984 | 3.05185 |
| 1983 | 3.08006 |
| 1982 | 3.11448 |
| 1981 | 3.17221 |
| 1980 | 3.22888 |
| 1979 | 3.28444 |
| 1978 | 3.31465 |
| 1977 | 3.31371 |
| 1976 | 3.30856 |
| 1975 | 3.29761 |
| 1974 | 3.29326 |
| 1973 | 3.28941 |
| 1972 | 3.27786 |
| 1971 | 3.27246 |
| 1970 | 3.26386 |
| 1969 | 3.22966 |
| 1968 | 3.17849 |
| 1967 | 3.13062 |
| 1966 | 3.076 |
| 1965 | 3.01185 |
| 1964 | 2.94293 |
| 1963 | 2.89284 |
| 1962 | 2.75638 |
| 1961 | 2.58971 |
| 1960 | - |