1957

1957: 643 companies

janvāris 84 companies

februāris 41 companies

marts 50 companies

aprīlis 40 companies

maijs 41 companies

jūnijs 52 companies

jūlijs 76 companies

augusts 60 companies

septembris 44 companies

oktobris 49 companies

novembris 50 companies

decembris 56 companies