There were 106 helicopter accidents in 2016, including 17 that resulted in fatalities. Those numbers represented a 12 percent decline when compared to 2015 and a 27 percent decrease when compared to 2013. The overall accident rate fell to 3.19 per 100,000 flight hours in 2016, compared to 3.67 accidents in 2015. Although the fatal accident rate did not decline by as large a margin, falling to 0.51 accidents per 100,000 flight hours last year from 0.52 in 2015, the rate is showing a significant improvement when measured over time. In 2014, the fatal accident rate stood at 0.65; in 2013 the rate stood at 1.02.