Levene enrolled at Columbia University and in his spare time conducted biochemical research, publishing papers on the chemical structure of sugars. In 1896 he was appointed as an Associate in the Pathological Institute of the New York State Hospitals, but he had to take time off to recuperate from tuberculosis.
This graph shows the median age of the resident population of the United States from 1960 to 2015. In 2015, the median age of the United States population was approximately 37.7 years.
BY Joshua Barajas December 29, 2014 at 6:45 PM EDT. The U.S. population is expected to reach 320.09 million on Jan. 1, 2015, a 0.73 percent increase from the previous year, the U.S. Census Bureau said in a statement Monday.he Census Bureau projected the countryâs population to be 320,090,857 at the start of the new year, adding that this calculation represented a 11.35 million person increase, or 3.67 percent, from the last population estimate in April 2010. RELATED LINKS. 1  National poverty rate drops for the first time since 2006.