Issue 10 1980	Issue 1 1990	Issue 2 6 February 1991	Issue 3 12 June 1991	Issue 4 11 September 1991	Issue 5 1992
Issue 6 1992	Issue 7 1992	Issue 8 20 January 1993	Issue 9 March 1993	Issue 10 1993	Issue 11 1993
Issue 13 1994	Issue 14 1994	Issue 15 1995	Issue 16 1995	Issue 17 1996	Issue 19 19 March 1998
Issue 20 1 October 1998	Issue 21 28 May 1999	Issue 22 18 February 2000	Issue 23 26 May 2000