Bestand
70.1965,16.Mai-7.Nov.; 71.1966,35 - 72.1967,10.Sept.; 74.1969,27.Apr. - 76.1971; 77.1972,7.Mai - 103.1998
Bestandslücken
[N=71.1966,45; 72.1967,2; 75.1970,18,2u.22u.24u.33; 76.1971,1-2u.29u.44-49; 77.1972,20u.26; 78.1973,42-52; 82.1977,5; 83.1978,24; 84,1979,22; 86.1981,51; 88.1983,23; 90.1985,13; 92.1987,52; 93.1988,1-2u.34; 94.1989,5u.46-51; 95.1990,1; 96.1991,2; 101.1996,33; 103.1998,16u.24u.35u.38]