Bestandslücken
[N=1923,223-239;1924,213,276;1925,145-147;1925,294;1926,77;1927,203,213;1928,49,83,208;1930,207;1932,24,35;1933,72,153,177,190;1934,141-142;1935,8;1936,116,148-149,194,201,261,275;1937,50,88,137,168-169,198,214,257;1938,170,180,182,185,187,193,196,209]