Jan 1981
|
Jul 1981
|
Dec 1982
|
Sep 1983
|
Mar 1984
|
Jun 1984
|
Apr 1985
|
May 1985
|
Aug 1985
|
Mar 1986
|
Mar 1987
|
May 1988
|
Aug 1988
|
May 1989
|
Sep 1989
|
Dec 1989
|
Apr 1990
|
May 1991
|
Jun 1992
|
Mar 1994
|
Mar 1994
|
Apr 1994
|
Feb 1996
|
Jul 1996
|
Oct 1996
|
May 1998
|
Mar 2000
|
Oct 2000
|
Mar 2001
|
Jul 2001
|
Aug 2005
|
Jan 2006
|
Nov 2006
|
Mar 2008
|
2009 (est.)
|
2010 (est.)
|
Mar 2015
|
Jul 2015
|
Oct 2015
|
1984
|
Oct 2002
|
Nov 1943
|
Sep 1944
|
Apr 2004
|
Apr 2004
|
Mar 1973
|
Dec 2009
|
Jun 1994
|
Aug 1958
|
May 1950
|