Single-family homes are now common in rural and suburban and even some urban areas across the New World and Europe, as well as wealthier enclaves within the Third World. They are most common in low-density, high-income regions. For example, in Canada, according to the 2006 census, 55.3% of the population lived in single-detached houses, but this varied substantially by region. In the city of Montreal, Quebec, Canada's second-most populous municipality, only 7.5% of the population lived in single-detached homes, while in the city of Calgary, the third-most populous, 57.8% did. Note that this includes the "city limits" populations only, not the wider region. Culturally, single-family houses are associated with suburbanization in many parts of the world. Owning a home with a yard and a "white picket fence" is seen as a key component of the "American dream" (which also exists with variations in other parts of the world).