A new report from the Centers for disease Control and Prevention (CDC) has shown that life expectancy for a newborn is about 79 years for the third consecutive year in a row.

The 2014 mortality report by the CDC showed that infant mortality in the United States was at a historic low i.e. 582.1 infant deaths per 100,000 live births. The report showed that ten overall causes of deaths for infants in 2013 to 2014 remained the same.

The researchers found differences in the number of deaths due to unintentional injuries, Alzheimer’s disease, stroke and suicide, and found that all of these were increasing. On the other hand, the number of deaths from cancer, diabetes, chronic lower respiratory disease, diabetes, influenza and pneumonia are found to be decreasing, said health officials.

Experts said that presently, they have no clue of why life expectancy has been flat lately, but they say suicides and fatal drug overdoses might be a major factor affecting it. Robert Anderson from the CDC said some researchers have wondered if US life expectancy would peak due to nation’s obesity problem and other factors.

S. Jay Olshansky, a public health professor at the University of Illinois-Chicago, has agreed on this point, but said it is too early to make any comment. The United States ranks below almost 40 other countries in life expectancy, according to the World Bank. Japan and Iceland tops the list with more than 83 years of life expectancy.

The data of the CDC’s present report is based on all the 2014 death certificates. The report showed that there were about 2.6 million deaths, or about 29,000 more than the previous year.