Thats because 10 was almost a tie.
The occupation of a Cop isnt in the Top 10 Most Dangerous, Because its #11 Most Dangerous.
Deaths are down significantly in the last 5 years.

Probably has alot to do with (De) Policing.
With post riots Cincinnati, St Louis, Ferguson etc.
It Moves in cycles, pendulum swings and the community decides they dont want law and order and to be policed, only now, I believe nationally, that aggressive policing is out to make way for the race baiters and race hustler pimp. Its still a Dangerous job. A very dangerous job in fact in most places, unless its a white suburb, but even those are disappearing.
Thanks Obama.