The 1970s ushered in a period of wide-ranging social and political changes, stemming largely from the concerns of the French-speaking majority about the conservation of their culture and language, given the traditional predominance of the English Canadian minority in the business arena. The October Crisis and the 1976 election of the Parti Québécois, which supported sovereign status for Quebec, resulted in the departure of many businesses and people from the city. In 1976, Montreal hosted the Summer Olympics. While the event brought the city international prestige and attention, the Olympic Stadium built for the event resulted in massive debt for the city. During the 1980s and early 1990s, Montreal experienced a slower rate of economic growth than many other major Canadian cities. Montreal was the site of the 1989 École Polytechnique massacre, one of Canada's worst mass shooting, where 25-year-old Marc Lépine shot and killed 14 people, all of them women, and wounding 14 other people before shooting himself at École Polytechnique.