Normal growth cycle for a blood python?

How long should I expect my blood pythons to keep growing? Atleast in any significant way.

At 18-24 months I'll look for a Borneo female to be 8-10 lbs and 4-4.5 ft,
30-36 months she'll be 5' and 15 lbs, 48 mo 5.5' and 20 lbs and then it slows from there..This is a well fed snake though..