A concern with any unified North American currency is the differing economic situations between each country. The Eurozone is broadly similar being service-based economies based on high public spending (compared to the United States), high taxes and wealth being created by the sale of goods and services. North America on the other hand has three distinct economies; one based mainly on agriculture, industry and manufacturing with a demand for free trade (Mexico), another based on services such as retail, with higher taxes and low public spending (United States), and a third based on services with higher taxes and higher public spending, with a large sector in primary goods such as oil, mining and lumber (Canada).