29/9/1980 - 6/2/1984

( 27/2/1984 - 8/10/1984 ) ( 15/9/1986 - 14/8/1989 )

9/10/1984 - 14/9/1986

15/8/1989 - 20/8/1991

21/8/1991 - 4/9/1994

5/9/1994 - 7/6/1997

6/9/1997 - 22/8/2001

22/8/2001 - 20/8/2005

22/8/2005 - 28/8/2008

30/8/2008 – 10/8/2010

28/10/2010– 1/9/2012

2/8/2012 - 4/9/2014

7/9/2014 - 4/9/2015

6/9/2015-30/8/2017

3/9/2017 - 17/9/2020

20/9/2020 - 24/8/2023