Airnav reports only general aviation activity and a very small percentage of military:
Aircraft operations: avg 919/day *
43% local general aviation
41% transient general aviation
16% air taxi
1% military
When I compared that airport's operations to some of the busier GA airports in the Northeast US, I see that Centennial is almost 100% busier than the big GA airports on this side of the Mississippi River.
For example, Teterboro and White Plains (two of the busiest GA airports serving NY City) show average operations/day of 548 and 461, and Bedford/Hanscom serving Boston comes in at 480 operations/day. Kennedy, to give you an idea, hosts about 1300 operations per day.
I would say that Centennial is one extremely busy GA airport in Colorado, if not the US.