Bestand
1990,1u.4u.8; 1991,7; 1992,1-4u.6-7u.9; 1993,1-5u.7-9; 1994,1-8; 1995,1-5; 1996,1-5; 1997,1-3; 1998,2-4; 1999,1-3; 2000,1-4; 2001,1-4; 2002,1-2u.4; 2003,1-4; 2004,1-4; 2005,1-4; 2006,1-4; 2007,1-4; 2008,1-2u.4; 2010,1-4; 2011,1; 2016,4; 2017,1