It has 366 days instead of the normal 365 days. The extra day is added in February, which has 29 days instead of the normal 28 days. Leap years occur every 4 years. 2016 is a leap year and so is 2020.
The difference between White males and females was 4.9 years, with life expectancies at birth of 75.7 and 80.6 years, respectively. White females could expect to live 3.8 years longer than Black females. Life expectancy has increased since 1970 for males and females in both racial groups.
Life expectancy at birth for white, non-Hispanic females in the United States declined slightly from 2013 to 2014, a change that could be a statistical blip but still represents a rare drop for a major demographic group, according to new data from the Centers for Disease Control and Prevention.