https://www.planecrashinfo.com/cause.htm https://www.planecrashinfo.com/cause.htm shows the number of crashes with 19 or more fatalities about halved in the pas

https://www.planecrashinfo.com/cause.htm https://www.planecrashinfo.com/cause.htm shows the number of crashes with 19 or more fatalities about halved in the past two decades. The total number of fatalities also about halved in that time frame. I think those data points explain at least part of the lower reporting.