That's good then. That's exactly what you want it to do...stay low and be the same (or close) every year.
my last two tests (done annually) have the same result of Tg.
A snapshot look at TG isn't of much use. TG is used mainly to monitor possible recurrence. If your TG was elevated by thyroid cancer, goes down after surgery, then starts to rise again, it can indicate recurrence. So, as far as TG is concerned, you have to look at it in series and see how it's trending.
What's the reference range on your TG test? Do you have prior TG results to compare this one to?
How do you feel?