My book - The Blacktail Deer of Western Washington, put out by Washington State Game Dept. in 1961 says that 93% of breeding is done by around the 25th of November, 98% by December 10th, and by Christmas, about 99.5% of the breeding activity is complete.
These dates are based on a study of the dates for which fawning occurred for over 1400 fawns, and an assumed gestation period of 203 days.
None of this information helped me kill a deer this year (yet)

I'd guess based on those numbers that anytime after the 10th, you'd be pretty lucky to see any rutting activity. I know the bucks quit coming into my back yard around the 12th of Nov. Nothing on my cam but does and fawns since.