In some ways a victim of his own success, the mayor of Kelowna h as been struggling in recent years to rein in his city as it slowly spreads across the B.C. interior, testing his ability to provide core municipal services and build badly needed infrastructure. Nor is the city’s middle-aged spread at all unique, according to the 2016 census data released Wednesday: Canada’s population of 35.15 million is settling in the bigger cities, ensuring they and their suburban neighbours keep growing, while small cities get smaller.