I assume you mean on parked domains for PPC or any program besides Google?
On targeted domains, I regularly reach 50%+ CTR. For untargeted domains, I still range from 2-10% CTR typically. I couldn't find a domain in my quick search that had less than a 1% CTR at any parking program.
Assuming your numbers continue, you're looking at a $4.90 RPM, which is well less than average. I don't have a domain parked right now with less than a $25RPM, and most are above that. For instance, uofky.com is a $35RPM, as the results are of course semi-targetted, with a CTR of 20%.
Knowing what your domain name was would help answer the question of how well it is performing.
-Allan