May 1981

May 1981: 266 companies

1 may 1981 57 companies

3 may 1981 1 companies

4 may 1981 20 companies

5 may 1981 7 companies

6 may 1981 9 companies

7 may 1981 5 companies

8 may 1981 9 companies

9 may 1981 1 companies

10 may 1981 2 companies

11 may 1981 13 companies

12 may 1981 14 companies

13 may 1981 5 companies

14 may 1981 13 companies

15 may 1981 14 companies

17 may 1981 1 companies

18 may 1981 10 companies

19 may 1981 5 companies

20 may 1981 12 companies

21 may 1981 10 companies

22 may 1981 11 companies

23 may 1981 1 companies

25 may 1981 10 companies

26 may 1981 12 companies

27 may 1981 10 companies

28 may 1981 3 companies

29 may 1981 8 companies

30 may 1981 3 companies