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.
Search All NYTimes.com. WASHINGTON, April 14â The average number of people per household in the United States declined last year to 2.67, the least ever recorded, the Census Bureau reported today.The average number of people in an American household declined from 2.69 in 1985, 2.76 in 1980 and 3.14 in 1970, the bureau said.lthough it has drawn attention in the last decade, it is part of a trend that dates at least to the last century. The average number of people per household was 5.55 in 1850, 5.04 in 1880, 4.76 in 1900 and 4.54 in 1910. It declined to 4.34 in 1920, 4.11 in 1930, 3.67 in 1940, 3.37 in 1950 and 3.33 in 1960.