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.
One corrolary to these shifts is that the white population is aging more rapidly than that of other racial groups. The 2010 census indicated that the median age for whites was 42 years. For Asians, it was 35.4. For Hispanics, it was 27.3. And for the population marking âmore than once race,â it was a staggering 19.9. Overall, just 7 percent of the minority population was age 65 or older, while 16 percent of the white population had already reached that milestone.