i dunno if your joking or not...but there aren't any fighters in canada that are prop driven. We have f-18's.
Anyway, snowbirds are prop driven, but their arieal stunt team. CC-130's use props. A lot of planes use props. The US airforce have planes with Props because they use 130's and many other planes like that as well.
http://www.airforce.forces.gc.ca/equip/equip1_e.asp
As for global military spending, it is really disturbing that so much of this money is spent on military. Military expenditures far outweigh education, health and other programs like that, which is in my mind, sad.
Peacekeeping expenditures is something like 0.8% of total military expenditure.