To solve this question we have to make deduct these 2 years. 2108 minus 1973 will give the answer.
You are 135 years old.
(1620 months are passed.)
From 1973 to 2108 there are 135 years. If you want to learn your age in 2108 (born in 1973) your age is 135.
Let's see what will be your age if you born +1 or -1 from that date.