22 April 1984
 7.04.1985
30 March 1986
19 April 1987
03.04.1988
26 March 1989
15 April 1990
31-March-1991
19 April 1992
11 April 1993
 3 April 1994
16. April 1995
 7 April 1996
30 March 1997
12 April 1998