May 1981

May 1981: 317 companies

1 may 1981 8 companies

3 may 1981 5 companies

6 may 1981 36 companies

8 may 1981 17 companies

11 may 1981 25 companies

14 may 1981 28 companies

20 may 1981 14 companies

21 may 1981 47 companies

25 may 1981 27 companies

26 may 1981 28 companies

31 may 1981 82 companies