| 年份 | 不丹 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.120903 |
| 2020 | 0.121682 |
| 2019 | 0.122482 |
| 2018 | 0.123344 |
| 2017 | 0.12498 |
| 2016 | 0.133376 |
| 2015 | 0.134809 |
| 2014 | 0.136075 |
| 2013 | 0.137469 |
| 2012 | 0.138946 |
| 2011 | 0.140468 |
| 2010 | 0.142591 |
| 2009 | 0.143333 |
| 2008 | 0.144983 |
| 2007 | 0.199967 |
| 2006 | 0.224727 |
| 2005 | 0.251763 |
| 2004 | 0.24308 |
| 2003 | 0.247389 |
| 2002 | 0.252 |
| 2001 | 0.256948 |
| 2000 | 0.262258 |
| 1999 | 0.267956 |
| 1998 | 0.274615 |
| 1997 | 0.279777 |
| 1996 | 0.280933 |
| 1995 | 0.276758 |
| 1994 | 0.26858 |
| 1993 | 0.261118 |
| 1992 | 0.247278 |
| 1991 | 0.237797 |
| 1990 | 0.241744 |
| 1989 | 0.244391 |
| 1988 | 0.266515 |
| 1987 | 0.284032 |
| 1986 | 0.290493 |
| 1985 | 0.29926 |
| 1984 | 0.308402 |
| 1983 | 0.317959 |
| 1982 | 0.305291 |
| 1981 | 0.303284 |
| 1980 | 0.313059 |
| 1979 | 0.310897 |
| 1978 | 0.308426 |
| 1977 | 0.318821 |
| 1976 | 0.329563 |
| 1975 | 0.326455 |
| 1974 | 0.3374 |
| 1973 | 0.333535 |
| 1972 | 0.344689 |
| 1971 | 0.356175 |
| 1970 | 0.368023 |
| 1969 | 0.345667 |
| 1968 | 0.357013 |
| 1967 | 0.368543 |
| 1966 | 0.380263 |
| 1965 | 0.392141 |
| 1964 | 0.404132 |
| 1963 | 0.416202 |
| 1962 | 0.428418 |
| 1961 | 0.440391 |
| 1960 | - |