The average car in Canada is 10.5 years old, in a steady state you double that to 2 * 10.5 =21 years lifespan on average. However the country isn’t in a steady state in 2005 there where 33.5 million people in Canada in 2025 that hit 41.5 million.

So because the number of new cars purchased each year is increasing the average age is significantly below 1/2 the average car’s lifespan.