Bestand
1977,4; 1979,2-4; 1980,3u.6-8; 1981,2-6; 1982,1-2u.4-6; 1983,1-6; 1984,1-6; 1985,1-6; 1986,1-6,1987,1-2u.4-6; 1988,1-6; 1989,2-3; 1990,1-3; 1991,1u.3; 1992,1-4; 1993,1-4; 1994,1-4; 1995,1-4; 1996,1-2; 1997,1-4; 1998,1-6; 1999,1-3; 2000,2-6; 2001,1-5; 2002,1-4; 2003,1u.3-5