Clean CANMOD CDI Data
clean_canmod_cdi.RdThe important cleaning steps include (1) removing CA- from ISO-3166-2
codes (because within Canada this is redundant) and (2) filtering out
all time-scales but the 'best'.
so that there is no chance of double-counting cases.
Arguments
- canmod_cdi
 Dataset from IIDDA of type
CANMOD CDI.- ...
 Arguments to pass on to
normalize_time_scales.