1957

1957: 407 companies

janvāris 44 companies

februāris 36 companies

marts 27 companies

aprīlis 40 companies

maijs 37 companies

jūnijs 34 companies

jūlijs 40 companies

augusts 25 companies

septembris 23 companies

oktobris 30 companies

novembris 31 companies

decembris 40 companies