Abaqus standard: Reactions at a contact surface in a mechanical simulation

Dear Ladies and gentlemen:

I am user of Abaqus v.12 and I am trying to find out, how can I get the total reaction force at a contact pair in a mechanical simulation for each step (and substeps) in a list. Is there in the CAE interface any possibility to do that or must I necessarily work with scripts?

Thank you for your help!

Jaime