May 1991

May 1991: 399 companies

2 may 1991 9 companies

3 may 1991 15 companies

6 may 1991 18 companies

7 may 1991 19 companies

8 may 1991 21 companies

9 may 1991 23 companies

10 may 1991 15 companies

13 may 1991 17 companies

14 may 1991 23 companies

15 may 1991 20 companies

16 may 1991 21 companies

17 may 1991 22 companies

20 may 1991 14 companies

21 may 1991 17 companies

22 may 1991 22 companies

23 may 1991 15 companies

24 may 1991 14 companies

28 may 1991 26 companies

29 may 1991 14 companies

30 may 1991 21 companies

31 may 1991 33 companies