How do Goalies Age Part II

Earlier today I posted an article showing how a goalies save percentage varies by age. It was pointed out that one of the flaws in that analysis is that I didn’t account for the fact that over time the average NHL save percentage has varied, and has generally increased over time. In fact, the change from the 1980’s to the 1990’s is quite significant. As a result I decided it was important enough to take the next step and account for variations in league wide save percentages. To accomplish this I took each goalies save percentage and divided it by

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