33x01: 1 January 1992
32x06: 30 August 1991
32x05: 12 July 1991
32x04: 7 June 1991
32x03: 20 May 1991
32x02: 6 May 1991
32x01: 15 March 1991
31x06: 17 August 1990
31x05: 27 June 1990
31x04: 25 June 1990
31x03: 27 April 1990
31x01: 1 January 1990
30x255: 22 December 1989
30x289: 8 December 1989
30x13: 8 November 1989