Violent crime in the U.S. fell 4.4 percent last year to the lowest level in decades, the FBI announced Monday.

In 2013, there were 1.16 million violent crimes, the lowest amount since the 1978’s 1.09 million violent crimes, Reuters reports.

All types of violent crimes experienced decline last year, with rape dropping 6.3 percent, murder and non-negligent manslaughter dropping 4.4 percent and robbery dropping 2.8 percent.

The rate of violent crime is 367.9 crimes for every 100,000 people, which marked a 5.1 percent decline since 2012. The rate has fallen each year since at least 1994.

Possible reasons for the decline include the country’s high incarceration rate, an aging population and an increased use of security cameras and cell phone videos capturing incidents.

[Reuters]

Write to Nolan Feeney at nolan.feeney@time.com.