As of 2010 Canadians make up 0.5% of the world's total population, having relied upon immigration for population growth and social development.The majority of illegal immigrants come from the southern provinces of the People's Republic of China, with Asia as a whole, Eastern Europe, Caribbean, Africa and the Middle East all contributing to the illegal population. Canadian culture has historically been influenced by Aboriginal, French and British cultures and traditions. Most of Canada's territory was inhabited and developed later than other European colonies in the Americas, with the result that themes and symbols of pioneers, trappers, and traders were important in the early development of the Canadian identity. In Canada, as elsewhere in the world of European colonies, the frontier of European exploration and settlement tended to be a linguistically diverse and fluid place, as cultures using different languages met and interacted. The need for a common means of communication between the indigenous inhabitants and new arrivals for the purposes of trade, and (in some cases) intermarriage, led to the development of Mixed languages.