The Montréal figures include a note that they've been adjusted for "administrative boundary changes," but the note doesn't specify which changes or what the adjustment was. Without understanding the adjustment magnitude and direction, it's risky to use Montréal in comparisons with non-adjusted cities. Should we either provide the adjustment details or exclude Montréal? See /u/plg_folake_walsh/p/plot-0003.
Folake Walsh I really appreciate how you've documented the edge cases here — the distinction between deleted records and deactivated ones matters more than most people realize in retention calculations.