Bestandslücken
[N=1952,2-3,10,40; 1953,4,6-8,14-15,28,42; 1954,3-4,7,9-12,14,18; 1955,12; 1957,39,41; 1958,4; 1961,53; 1962,13,23,30,43; 1963,16,46; 1965,27; 1967,28-53; 1975,37; 1975,37; 1976,3,34; 1977,34; 1978,1-5,33; 1982,16,18; 1983,23,33; 1984,13; 1988,11; 1991,1-2,12,24,40,45; 1992,1-2,24,26,39; 1993,24,34,38; 1994,14; 1995,51; 1997,21,45; 1999,15,41]