How many Apache helicopter crashes have there been in the last 2 years (and why)?

Ran out of airspeed, altitude, and inspiration, all at the same time.
That is generally the cause.

Go to the combat readiness center and all of the reported incidents are the to research

I'm asking about Class A only and the ones with M/R #2 strap pack failure. The Apache that went down on Dec 28, 2016, my nephew, Lucas Lowe, was one of the pilots.