Companies registered by month in 1981
- January - 5552 companies registered
- February - 669 companies registered
- March - 854 companies registered
- April - 728 companies registered
- May - 796 companies registered
- June - 966 companies registered
- July - 835 companies registered
- August - 828 companies registered
- September - 755 companies registered
- October - 929 companies registered
- November - 887 companies registered
- December - 790 companies registered