I can count 35 years of full-time (or greater) work, another 3 years of part-time, and the usual 4 years of summers working during undergrad school. High school summers spent working for my dad don't count - although it was generally harder work, and less well compensated, than the others.
Sadly, I only have 13 quarters toward SS (the school jobs were considered "honoraria" and were not subject to SS deductions).