| Year | Government |
| 1999 | |
| 2004 | |
| 1970 | |
| 1970 | |
| 1980 | |
| 1993 | |
| 1970 | |
| 1970 | |
| 1993 | |
| 1991 | |
| 1970 | |
| 1996 | |
| 1973 | |
| 1970 | |
| 1977 | |
| 1970 | |
| 1977 | |
| 1977 | |
| 1979 | |
| 1983 | |
| 1989 | |
| 1970 | |
| 1970 | |
| 2004 | |
| 1981 | |
| 1979 | |
| 1970 | |
| | Year | Government |
| 1991 | |
| 1973 | |
| 1970 | |
| 2001 | |
| 1970-77, 1989 | |
| 1970 | |
| 1980 | |
| 1970 | |
| 1996 | |
| 1970 | |
| 1981 | |
| 1977 | |
| 1970 | |
| 1971 | |
| 1981 | |
| 1993 | |
| 1970 | |
| 1981 | |
| 1999 | |
| 1970 | |
| 1976 | |
| 1996 | |
| 1970 | |
| 1970 | |
| 1979 | |
| 1970 | |
| 2008 | |
| 2006 | |
| 2006 | |
| 2004 | |
| 2004 | |
| 1999 | |
| 2004 | |
| 2004 | |
| 2008 | |
| 1999 | |
| 2006 | |
| 1996 | |
| 2006 | |
| 2002 | |
| 1999 | |
| 2008 | |
|