Here is the Radnet Gamma count by energy range:

I'm not sure what to make of this common pattern across all ranges. I thought the 8 separate energy band graphs would help narrow down what is causing this 5 year maximum, but all the bands look very much the same with slightly different scales.
_________________https://netc.com/chart/view.php?n=1%3A919A925A.5 Toronto, Ontario, Canada SBM-20 indoors