To solve this question we have to make deduct these 2 years. 2099 minus 1983 will give the answer.
You are 116 years old.
(1392 months are passed.)
From 1983 to 2099 there are 116 years. If you want to learn your age in 2099 (born in 1983) your age is 116.
Let's see what will be your age if you born +1 or -1 from that date.