Bilingualism became official policy for the conduct of municipal business in 2002, and 37.6% of the population can speak both languages as of 2016, making it the largest city in Canada with both English and French as co-official languages. Those who identify their mother tongue as English constitute 62.4 percent, while those with French as their mother tongue make up 14.2 percent of the population. In terms of respondents' knowledge of one or both official languages, 59.9 percent and 1.5 percent of the population have knowledge of English only and French only, respectively; while 37.2 percent have a knowledge of both official languages. The overall Ottawa–Gatineau census metropolitan area (CMA) has a larger proportion of French speakers than Ottawa itself, since Gatineau is overwhelmingly French speaking. An additional 20.4 percent of the population list languages other than English and French as their mother tongue. These include Arabic (3.2%), Chinese (3.0%), Spanish (1.2%), Italian (1.1%), and many others.