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