The overall death rate in the United States ticked up in 2015, according to new federal data, NBC News reported.
Nearly 730 deaths were reported for every 100,000 people in 2015 compared to 723 deaths in 2014, according to initial data from the National Center for Health Statistics.
Experts aren't sure why the death rate has been rising and need to analyze the data which shows that suicides, Alzheimer’s and gun deaths increased in 2015.
The last complete report on deaths in the U.S. came in 2013, when 2.6 million Americans died. The crude death rate was 821.5 deaths per 100,000 and the average life expectancy was 78.8 years. The crude deaths rate — not adjusted for age — was 841.9 per 100,000 people in 2015.
