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.
About This Statistic. This statistic depicts the age distribution in the United States from 2005 to 2015. In 2015, about 18.95 percent of the U.S. population fell into the 0-14 year category, 66.26 percent into the 15-64 age group and 14.79 percent of the population were over 65 years of age.