To which a reader named Justin remarked "I believe the 9th largest economy in the world is now Spain."
That brings up some interesting questions - How do we know which country has the bigger economy? How do we measure the size of the economy?
Typically there's a couple different ways to do it.
GDP is Gross domestic product. For a region, the GDP is "the market value of all the goods and services producted by labor and property located in" the region, usually a country. It equals GNP minus the net inflow of labor and property incomes from abroad.
A key example helps. A Japanese-owned automobile factory in the US counts in US GDP but in Japanese GNP.
Currently, according to that definition Canada has the 8th largest economy in the world and Spain is 9th. So Justin is correct!
The other way of calculating GDP is taking into account differences between countries due to purchasing power parity. There are a few different agencies who calculate GDP (PPP) for each country, such as the IMF and the World Bank.
I hope this clears up the confusion. Canada is anywhere from the 8th to the 12th largest economy in the world, depending on who is doing the calculation.