The large populations of both Quebec and Ontario cause both provinces to be subdivided into three and five postal districts, respectively, and each has at least one urban area so populous that it has a dedicated postal district (""H"" for the Montreal region, and ""M"" for Toronto). On the other hand, the low populations in Nunavut and the Northwest Territories (NWT) mean that even after Nunavut separated from the Northwest Territories and became its own territory in 1999, they continue to share a postal district.