How many years did it take for you to earn your B.S. with all the constant co-oping?

An example schedule for an Engineering student is:

Year 1: School, coop, School

Year 2: coop, School, coop

Year 3: School, coop, School

Year 4: coop, School, coop

Year 5: School, school.

4 years and 8 months. Order may vary slightly.

It takes an extra 8 months to get your degree. Your 4-year degree basically turns into a 5-year degree.