To solve this question we have to make deduct these 2 years. 2099 minus 1958 will give the answer.
You are 141 years old.
(1692 months are passed.)
From 1958 to 2099 there are 141 years. If you want to learn your age in 2099 (born in 1958) your age is 141.
Let's see what will be your age if you born +1 or -1 from that date.