I took my SS at 66 on my husband's account. He is 77 and has been collecting since he was 64 due to health reasons. I believe they awarded me half of what would have been his full retirement since I filed at full retirement age. I will be switching at 70 to my own. These last four years of work have been my highest ever - three, sometime 5 times what I ever made in any year. I know my amount will rise 8% each year; but could it rise more due to my earnings?