april 1980

april 1980: 72 companies

2. april 1980 1 companies

10. april 1980 1 companies

13. april 1980 5 companies

14. april 1980 1 companies

15. april 1980 1 companies

17. april 1980 60 companies

20. april 1980 1 companies

21. april 1980 1 companies

24. april 1980 1 companies