The country is comprised of 50 states and several politically designated territories and commonwealths, of which Puerto Rico, the U.S. Virgin Islands, Guam, and American Samoa are just a few.
Between 2010 and 2015, the U.S. population grew by 4.1%, from 303,956,272 to 316,515,021, making it the third most populous country in the world. The population has become more socially and ethnically diverse. Between 2010 and 2015, the foreign-born share of the population increased to 13.2%.
Life expectancy at birth was 78.8 years in 2014 (81.2 in women and 76.4 in men).
The U.S. economy is the largest in the world, with a gross domestic product (GDP) of over US$ 18 billion and per capita income of US$ 56,116.
(Source: Health in the Americas+, 2017 Edition)
