To solve this question we have to make deduct these 2 years. 2099 minus 1971 will give the answer.
You are 128 years old.
(1536 months are passed.)
From 1971 to 2099 there are 128 years. If you want to learn your age in 2099 (born in 1971) your age is 128.
Let's see what will be your age if you born +1 or -1 from that date.