The number of Canadian users of Facebook plummeted in May, with around 10 per cent of Canadians saying sayonara to the social networking site. According to Inside Facebook, a site that tracks such data, 16.6 million Canadians used the site at the end of the month, down 1.52 million from the beginning of May. We weren’t alone. The United States, Britain, Norway and Russia all posted declines. And those statistics helped drag down the overall number of users joining Facebook. Whereas last year around 20 million people hopped on board each month, now that number has been cut almost in half. The slow down couldn’t come at a worse time. Wall Street is abuzz with speculation that Facebook will launch its much-anticipated IPO next year.