[canucker2016]

There are two survey questions concerning non-Canadian born students in the linked 2020 profile PDF:

1) International vs Domestic students (6.2% vs 93.8%)

2) Did you immigrate to Canada? (47.56% yes)

You used the answer for 2).

I think the answer for 1) answers your question better than the answer for 2), which doesn't answer when/why they immigrated to Canada.

Plus you're looking at the profile for the 2020 Software Engineering class. Computer science is a different program in the Math faculty. The two programs may have different international student composition.

Tuition is one of the reasons there are so few international students. International students in UWaterloo SWEng pay almost 4x as much as domestic students (C$61.3K vs C$17.1K) - see https://uwaterloo.ca/future-students/financing/tuition.

International CS students pay C$45.5K vs C$9.3K for domestic CS students.