Bestand
1970,1-9; 1971,1-13.16-30; 1972,1-35; 1973,1-40; 1974,1-20; 1975,1-28; 1976,1-27; 1977,1-28; 1978,1-20; 1979,1-34; 1980,1-18; 1981,1-12; 1982,1-10; 1983,1-7; 1984,1-5; 1985,1-2; 1986,1-3; 1987,1-2; 1988,1-3; 1989,1-2; 1991,1-2; 1992,1-2, 1993,1-2; 1996,1-3; 1998,1