The automobile, movie, radio, and chemical industries skyrocketed during the 1920s. Of chief importance was the automobile industry. Before the war, cars were a luxury. In the 1920s, mass-produced vehicles became common throughout the U.S. and Canada. By 1927, Ford discontinued the Model T after selling 15 million of that model. Only about 300,000 vehicles were registered in 1918 in all of Canada, but by 1929, there were 1.9 million, and automobile parts were being made in parts of Ontario near Detroit, Michigan. The automobile industry's effects were widespread, contributing to such industries as highway building, motels, service stations, used car dealerships and new housing outside the range of mass transit.