september 1980

september 1980: 784 companies

1. september 1980 37 companies

2. september 1980 27 companies

3. september 1980 27 companies

4. september 1980 37 companies

5. september 1980 37 companies

8. september 1980 23 companies

9. september 1980 21 companies

10. september 1980 42 companies

11. september 1980 31 companies

12. september 1980 29 companies

15. september 1980 31 companies

16. september 1980 37 companies

17. september 1980 37 companies

18. september 1980 56 companies

19. september 1980 28 companies

22. september 1980 33 companies

23. september 1980 35 companies

24. september 1980 38 companies

25. september 1980 33 companies

26. september 1980 50 companies

29. september 1980 41 companies

30. september 1980 54 companies