A lot of it was still experimental even the few years older that you than I am ...
I know for a FACT they were still "tweaking" a few of them when I was younger ...
Then, all of a sudden, it all just came in "cocktail mode" ... (All mixed together) ...
My brothers and I are all 3 years apart ... 45, 42, 39 ...
In that 6 year span they really just got the "cocktail" down, so to speak ...
So much so that if some children had reaction, they didn't know which ones to remove ...
My youngest brother had that, and they gave him a little at a time to "see which one(s)" were the cause ...
He got Chicken Pocks 3X in his youth; each one worse than the next ...
Go figure that one out ...
PS:
(I was also done in .mil too ... I'm kinda glad for that one, actually)