Bestand
1976,38,53,82,94-95,123,137,155,160,167,170,188,191,195,208,218,226,239,247; 1977,23,33,40,47,80-82,86,94,105,118,155,163,176,186,216,226,239; 1978,18,54,112; 1983,277,294; 1984,4,30,70,72,135,165; 1985,6,43,69,79,95; 1986,9,67,78,110; 1987,94,126,134,231; 1988,34,131,201,212,246; 1989,117,212