Bentley's 15 month check up

Bentley
Weight: 21lb 10 oz, almost time to switch car seats 32%
Height: 30.75" 33%
Head circumference: 47.5" 70%

What does all of this mean, I have one big headed boy :) Bentley is now walking well, squatting and standing up, copying all of our actions, kicking and throwing balls, and saying lots of words.  His favorite words are Mama, Dada, ball, bottle, baby, basketball, Hi, Bye bye.  He is a great eater and spends most of his day playing with cars and airplanes, exploring our backyard, and trying to be like his older brother.  Love this kid to pieces.  Glad he checked out ok.  I remember when he was first born and he had several abdominal problems.  I am so grateful that he grew out of all of those things without much intervention, and we now have one lovable  healthy little boy.