Bestand
1968(1970)=2,58,6; 1969(1970)=2,59,3; 1970(1971)=2,60,2; 1971(1972)=2,61,3; 1972(1973)=2,61,4; 1973(1974)=2,63; 1974(1975)=2,66; 1975(1976)=2,67; 1976(1977)=2,69; 1977(1978)=2,71; 1978(1979)=2,73; 1979(1980)=2,75; 1980(1981)=2,77; 1981(1982)=2,79; 1982(1983)=2,81; 1983(1984)=2,82