| Dates | Place |
|---|
| June 1950 - June 1958 | |
| October 1958 - August 1961 | |
| September 1961 - June 1962 | |
| September 1962 - October 1963 | |
| December 1963 - June 1964 | |
| September 1964 - February 1968 | |
| November 1968 - July 1972 | |
| August 1972 - May 1974 | |
| August 1974 - January 1976 | |
| March 1976 - April 1978 | |
| July 1978 - April 1979 | |
| May 1979 - February 1984 | |
| April 1984 - August 1986 | |
| February 1987 - December 1989 | |
| January 1990 - September 1992 | |
| October 1993 - June 1997 | |
| September 1997 - September 1998 | |
| October 1998 - February 1999 | |
| January 2001 - July 2006 | |
| March 2007 - June 2012 | |
| August 2013 - December 2016 | |
| 2017 - 2018 | |