The following five definitions relating to primary care should be taken together. They describe the care provided to the patient, the system of providing such care, the types of physicians whose role in the system is to provide primary care, and the role of other physicians, and non-physicians, in providing such care.
Where The U.S. Gets Its Oil. America is one of the world's largest oil producers, and close to 40 percent of U.S. oil needs are met at home. Most of the imports currently come from five countries: Canada, Saudi Arabia, Mexico, Venezuela and Nigeria.
Approximately 16% of total trade with NAFTA partners is in petroleum products. Canada and Mexico accounted for 46% ($110.9 billion) of total U.S. crude oil imports ($241.8 billion) in 2014. Canada is the leading supplier of crude petroleum oil to the United States, followed by Saudi Arabia and Mexico.