whats healthy igf1 level on a 35yo man?

[jetcity]

i got a copy of my bloodwork from my dr, and i have no clue what i'm looking@...

insulin like growth factor 1   157 ng/ml

age            male               mean      sd
31-40         132 - 333        226        62

does this look like for a 35yo or 60-70yo?

i appreciate the help.