april 1981

april 1981: 234 companies

1 april 1981 56 companies

2 april 1981 14 companies

3 april 1981 7 companies

4 april 1981 2 companies

6 april 1981 12 companies

7 april 1981 8 companies

8 april 1981 8 companies

9 april 1981 7 companies

10 april 1981 7 companies

12 april 1981 1 companies

13 april 1981 4 companies

14 april 1981 11 companies

15 april 1981 14 companies

17 april 1981 1 companies

18 april 1981 2 companies

20 april 1981 2 companies

21 april 1981 2 companies

22 april 1981 3 companies

23 april 1981 8 companies

24 april 1981 6 companies

25 april 1981 3 companies

26 april 1981 1 companies

27 april 1981 9 companies

28 april 1981 10 companies

29 april 1981 6 companies

30 april 1981 30 companies