The Mrs. says you're correct hunterbuck, however , your timeline is incorrect, they don't stretch them till age 18.
Yeah, I wasn't really setting all that as a timeline...I was just using age 18 so that all grade school years were covered.
Those "immunization schedules" cover things like a flu vaccine every year, which is totally voluntary, in addition to the required courses of the 4 immunizations that are truly required. You can run the number up really quickly if you follow those schedules. Maybe you can get close to 60, but less than a quarter of that number are required.