april 1980

april 1980: 1 751 companies

1. april 1980 888 companies

2. april 1980 23 companies

3. april 1980 27 companies

4. april 1980 2 companies

5. april 1980 36 companies

6. april 1980 11 companies

7. april 1980 33 companies

8. april 1980 38 companies

9. april 1980 37 companies

10. april 1980 55 companies

11. april 1980 30 companies

12. april 1980 20 companies

13. april 1980 2 companies

14. april 1980 44 companies

15. april 1980 73 companies

16. april 1980 55 companies

17. april 1980 28 companies

18. april 1980 24 companies

19. april 1980 20 companies

20. april 1980 26 companies

21. april 1980 41 companies

22. april 1980 39 companies

23. april 1980 29 companies

24. april 1980 25 companies

25. april 1980 39 companies

26. april 1980 13 companies

27. april 1980 6 companies

28. april 1980 39 companies

29. april 1980 21 companies

30. april 1980 27 companies