[Docere]

Here is the percentage of the population is at least 3rd generation Canadian. Big east-west difference and very evident in "Canadian" responses today.

Both parents Canadian-born

PEI 88.5%
Nova Scotia 79.7%
New Brunswick 83.4%
Quebec 82.6%
Ontario 48.5%
Manitoba 26.1%
Saskatchewan 23.1%
Alberta 19.2%
BC 18.9%

Canada total 53.4%