I was curious too and did a similar calculation. Yeah, it would be a 2.3-2.4% annual growth rate.
It's great to see some unabashed ambition on this front, but it does seem, if anything, over-ambitous.
That kind of growth rate would make us the second- or third-fastest growing city in the country, tied with Calgary and Edmonton. (The Alberta cities were both well over three percent annually the previous year, but, you know, oil.)
And more than that, to achieve 50,000 people in five years, we'd have to start growing at that pace
right now. I don't really see how it's doable, barring some miracle. But maybe it's a shoot-for-the-stars strategy, the idea being that we may not get there, but we'll still do pretty well.