Bestand
1.1990,2,3; 2.1991,1-3,5,9-12; 3.1992,1-3,5-12; 4.1993,1,2,6,8-12; 5.1994,1-9; 6.1996,9-12; 7.1997,1-4,6-12; 8.1998 - 9.1999,7; 10.2000,1,3,6-8,10-12; 11.2001 - 12.2002,2,6,7,10-12; 13.2003,1-4,6-11; 14.2004,2,3,6,7; 15.2005,1; 16.2006,4,6-12; 17.2007,5-8,10,11; 18.2008,3-12