Bestand
1973 - 1989; 1990,1-29,33-51; 1991,2-28,32-51; 1992,2-27,31-52; 1993,2-26, 30-51; 1994,2-27,31-51; 1995,2-30,34-51; 1996,2-51; 1997,2-31,35-51; 1998,2-31,35-47,49-51; 1999,1-30,34-51; 2000,2-30,34-51; 2001,2-41,43-51; 2002,2-51; 2003,2-51; 2004,2-52; 2005,2-30,34-51; 2006,2-51; 2007,2-17,19-51; 2008,2-51; 2009,2-51; 2010,2-5,7-20,22-51; 2011,2-30,34-51; 2012,2- 51; 2013,2-51; 2014,2-51; 2015,2-38,40-51; 2016,1-30,34-51; 2017,2-30,34-51; 2018,1-30,34-51; 2019,2-51-52; 2020 - 2023; 2024,2-30,34-51