1980

1980: 17 922 companies

Januar 2 038 companies

Februar 1 188 companies

März 1 493 companies

April 1 751 companies

Mai 1 612 companies

Juni 1 319 companies

Juli 1 664 companies

August 1 382 companies

September 1 317 companies

Oktober 1 560 companies

November 1 371 companies

Dezember 1 227 companies