Each pup is different. My oldest boy, Bevo was only around 3 pounds (if that) at 1 year. Tiny little guy... Now, at age 3 1/2, he is 6 1/2 pounds. He did most of his growing AFTER his 1st birthday.
Mack is 1 1/2 old. He hasn't gained much weight since he was about 7 months old... Even after his neuter, he hasn't gained!!
So...in answer to your question... WHO KNOWS!!
