Canada

The way it's calculated by Stats Canada is that of 100% of the residential properties that exist, 65% of them are occupied by the family that owns the property. This can include adult children.

Basement suites are counted as a separate household, even less-than-legal ones.

That does mean that there are less than 65% of people that own a home, but you also have to account for the fact that Homeowners are FAR more likely to vote than non-home owners from a demographic perspective. The voting block is absolutely massive AND is the group that has money to fund political campaigns.

Apparently it's 63% of Canadian families:

• In 2016, 63% of Canadian families owned their homes, up from 60% in 1999. Almost all of this increase was because of population aging, given that families in older age groups are more likely to own their homes.

other fun facts:

• From 1999 to 2016, mortgage debt represented two-thirds of the overall increase in debt for Canadian families, while consumer debt made up the remainder. In recent years (2012 to 2016), mortgage debt was responsible for 100% of the increase in total debt.

• From 1999 to 2016, the median amount of mortgage debt among Canadian families with a mortgage almost doubled, from $91,900 to $180,000 in 2016 constant dollars. The amount of mortgage debt increased in nearly all demographic groups and in almost all regions of Canada.

I think the stat remains sort of relevant.