In my area, that rack would suggests 2 1/2 years old. It is fairly narrow, inside the ears, not particularly tall, and does not have the mass I see on 3 1/2 and older deer here. It has a bigger brow tines and a bit more width than our best 1 1/2 year old deer. I'm in central VA. I find that guessing age based on a rack is approximate at best and there is some variation with locality.
One step better would be to pull the jawbone and have it aged by a local biologist based on tooth wear. They are pretty accurate up to about 3 1/2 beyond that accuracy drops off.
You could always pull a tooth and send it to a lab for the most accurate aging.