Can you guess which country sends Canada the greatest number of foreign workers? Here’s a hint. It’s not the U.S. or Mexico, despite the opportunities for cross-border employment provided by the North American Free-Trade Agreement (NAFTA). The correct answer, according to a recent survey, is the Philippines. In 2009 there were 51,325 Filipinos working in Canada and a good number of them entered the country under the Live-in Caregiver class..