Bestand
1997,2; 1998,1,3-4; 1999,1,3-4; 2000,1-2,4; 2001,1,3-4; 2002; 2003,2-4; 2004; 2005,1,3-4; 2006; 2007,3-4; 2008,1-3; 2009,3; 2010,2-3; 2011,2-4; 2012 - 2013; 2014,1-3; 2015,2-4; 2016,2; 2016,4; 2017,1-3; 2018,2-4; 2019,1-3; 2020,2/3; 2022,1; 2022,3-4