Although the end year in the title is 1949, there are now deaths for 1950 in the database. That’s 43,453 death registrations added. a couple of hundred fewer than the 43,641 deaths in 1949.
The number of deaths in this Ancestry database totals 4,200,698.
The Archives of Ontario holds death registrations to 1952.
I discovered, quite by accident, that 1950 Ontario deaths are on Ancestry. I found small I searched for.