september 1981

september 1981: 284 companies

1 september 1981 8 companies

2 september 1981 10 companies

3 september 1981 19 companies

4 september 1981 18 companies

6 september 1981 16 companies

8 september 1981 30 companies

13 september 1981 28 companies

14 september 1981 38 companies

16 september 1981 21 companies

20 september 1981 23 companies

22 september 1981 42 companies

23 september 1981 10 companies

25 september 1981 16 companies

28 september 1981 5 companies