1981

1981: 18 235 companies

Januar 1 464 companies

Februar 1 629 companies

März 1 835 companies

April 1 690 companies

Mai 1 564 companies

Juni 1 567 companies

Juli 1 400 companies

August 1 366 companies

September 1 522 companies

Oktober 1 405 companies

November 1 405 companies

Dezember 1 388 companies