Add-on, statistical strata: share of the last 5 years spent in each official band for this day-of-year, the percentile b

Add-on, statistical strata: share of the last 5 years spent in each official band for this day-of-year, the percentile bands, and where the current reading falls. Backtestable, and stated as approximate. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed.