Bestandslücken
[N=79.1970,4; 80.1971,1,3; 82.1973,2,4; 83.1974,1,4; 85.1976,1-2; 88.1979,1-3; 90.1981,3-4; 91.1982,3-4; 92.1983,4; 93.1984,4; 95.1986,1; 101.1992,4; 102.1993,1,3-4; 104.1995,3; 106.1997,3; 112.2003,3; 116.2007,2,4; 123.2014,2; 130.2021,3]