I much height can I get?!

I much height can I get?

I am an 18 year old male( turning 19 in 2 months) and I have grown 3/4 of an inch in the past year. However my growth as always kind of been steady, I never really had a huge growth spurt( peak was 2 inches in one year 14-15) At 5'8 3/8 at just 15 my growth pattern told me that I was going to be 5'11, well it never happened( Dad is like 5'11.5 mom 5-4) Both of my grandpas were 6 feet). when I turned 17 I had grown only to 5 foot 9. I Thought I was done growing( even though I looked like a 14 year old without any hair on my face) Well when I turned 18 during last summer, all of a sudden my voice started cracking, started growing light facial hair, fine chest hairspimples all over the place and grew .70 of an inch to my current height of 5'9.7 I still have very oily skin and my voice still breaks occasinaly and my facial hair grows very slow. In your opinion how much height can you think I can get, and people think I look like I am 16

The fact that puberty had a late onset looks well for you- you have a good chance there is more height to come.

Double your height when you were 2 years old- this is ROUGHLY how tall you will be when you reach maturity.

Ask you mother if she kept your medical record from that period.