I'm 17, started lifting on a regular basis about 6 weeks ago, focusing on the Big 4 with a bit of bicep/tricep/leg isolation work added in. Seeing the stats of some guys my age and above is slightly concerning though, as I can't tell whether I'm a lot weaker than I'm meant to be at my age. Currently:

5x5 Bench press - 70lb 5x5 Overhead press - 55lb 5x5 Deadlift - 75-80lb 5x5 Squat - 80-85lb

Obviously I'll keep working hard at it, but is there significant cause for concern? Thanks RP

EDIT: may as well add, I'm 5'11 and weigh 150lb