1981

1981: 17 577 companies

Januar 1 726 companies

Februar 931 companies

März 1 431 companies

April 1 637 companies

Mai 1 603 companies

Juni 1 463 companies

Juli 1 677 companies

August 1 442 companies

September 1 412 companies

Oktober 1 562 companies

November 1 236 companies

Dezember 1 457 companies