april 1980

april 1980: 238 companies

2. april 1980 3 companies

3. april 1980 1 companies

8. april 1980 12 companies

9. april 1980 14 companies

10. april 1980 29 companies

13. april 1980 18 companies

14. april 1980 5 companies

15. april 1980 7 companies

16. april 1980 6 companies

17. april 1980 17 companies

18. april 1980 8 companies

20. april 1980 6 companies

22. april 1980 8 companies

23. april 1980 15 companies

24. april 1980 10 companies

25. april 1980 6 companies

27. april 1980 22 companies

28. april 1980 32 companies

29. april 1980 4 companies

30. april 1980 15 companies