If there's one thing that's easy to forecast, it's the aging of the population: every year, everyone ages by a year. We take this factor into account.
You're right that in Canada, labour force growth is slowing down because of the aging population and the increasing number of retiring baby boomers. Canada is fortunate to have a much higher rate of immigration compared to other G7 countries. This is one of the main reasons why, in our forecast, Canada's GDP growth trend is higher than that of other countries, even the United States.