Mine went up from 1.07 to 2.20 in one year, but my Dr. was not concerned. I had to force her to order the whole thyroid panel. Get it tested, it couldn't hurt and may give you useful information.
I wanted mine tested due to a long list of hypothyroid symptoms I was experiencing. It turns out that my thyroid is fine. My problems arose from being VLC for too long, which can turn down thyroid function to a dangerous point for some people.