To solve this question we have to make deduct these 2 years. 2118 minus 1983 will give the answer.
You are 135 years old.
(1620 months are passed.)
From 1983 to 2118 there are 135 years. If you want to learn your age in 2118 (born in 1983) your age is 135.
Let's see what will be your age if you born +1 or -1 from that date.