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.
Prior to that, in 2014 over 66% of world oil production came from the top ten countries: Saudi Arabia 542 Mt (13%), Russia 529 Mt (13%), United States 509 Mt (12%), China 212 Mt (5%), Canada 208 Mt (5%), Iran 166 Mt (4%), Iraq 160 Mt (4%), Kuwait 158 Mt (4%), United Arab Emirates 157 Mt (4%) and Venezuela 151 Mt (4%).