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.
The U.S. population is a major consumer of oil and the United States can't produce enough oil on its own to meet this demand. In 2008, the United States produced around 4.9 million barrels of crude oil per day [source: U.S. Energy Information Administration] -- that's almost two billion of barrels of crude oil for the year! However, the United States still has to import more than twice that amount to fill its business and consumer needs. Looking again at 2008, the United States imported around 9.8 million barrels of crude oil per day from other countries [source: U.S. Energy Information Administration], and that comes out to a whopping 3.5 billion barrels per year!