By total numbers, probably. As a % of population, I don't think the US comes even close to the top. Probably even Canada and other North American countries have a even higher percentage, so it doesn't even have the most in North America.
And just eyeballing it, you'll notice most countries demographics don't radically change in the span of a generation.
https://en.wikipedia.org/wiki/List_of_sovereign_states_and_d...
I’m not sure about that compared to other countries, but I’m also not sure why it’d be desirable to have a higher percentage. Seems like it’d be extremely risky to an existing society to even hit something like 33%
It has 10x the US per-capita immigration quotas. And it takes less than a single electoral cycle to go from permanent resident to citizen!
Unsurprisingly, the current liberal party in power is very popular among immigrant born population...