Not sure about Canada but in the U.S. it's 30%. Just curious as it's seems contrary to the prevailing narrative out there...why would you assume it's a small fraction?
https://www.samhsa.gov/sites/default/files/programs_campaign...
https://www.samhsa.gov/sites/default/files/programs_campaign...
Technically, I was "homeless" for 7 months in my life--but it was a planned thing, at no point did I ever not have a roof at night, but a few of those nights it was a tent roof.