The International Air Transport Association released its data revealing statistics for air safety throughout 2015.

The global jet accident rate recorded was equal to one major accident for every 3.1 million flights, which was more than what was seen in 2014 but still better than the average over the previous five years. The year saw four accidents causing passenger fatalities, for a total of 136 deaths, which was overall much better than the previous five-year average of 17 accidents with 504 fatalities per year.

The incidents involving Germanwings 9525 and Metrojet 9268 were not included in the collected data, as both incidents resulted in what IATA classified as deliberate acts of unlawful interference (pilot suicide and suspected terrorism, respectively).

In 2015, more than 3.5 billion passengers flew safely on 37.6 million flights. Overall accidents, including those not causing any fatalities, were at 68 accidents, down from 77 in 2014 and the five-year average of 90.

“2015 was another year of contrasts when it comes to aviation’s safety performance,” said Tony Tyler, director general and CEO, IATA. “In terms of the number of fatal accidents, it was an extraordinarily safe year. And the long-term trend data show us that flying is getting even safer. Yet we were all horrified by two deliberate acts — the destruction of Germanwings 9525 and Metrojet 9268. While there are no easy solutions to the mental health and security issues that were exposed in these tragedies, aviation continues to work to minimize the risk that such events will happen again.”