Side-by-side year-over-year panel across TPS categories
Source:R/tps_crime.R
morie_tps_yoy_panel.RdFor each named TPS category in dfs, groups by the dataset's
year column (OCC_YEAR preferred, REPORT_YEAR
fallback), restricts to plausible years (1990-2030), and joins all
series column-wise into a single panel of incident counts.