"For the DoD services, the percentage of military personnel who smoked cigarettes in the past 30 days decreased significantly from 51% in 1980 to 30% in 1998. It increased significantly from 1998 (30%) to 2002 (34%), and while not showing significant declines in 2005 (32%) and in 2008 (31%), has been slowly trending downward since 2002."

Source

Robert M. Bray, et al., "2008 Department of Defense Survey of Health Related Behaviors Among Active Duty Military Personnel, A Component of the Defense Lifestyle Assessment Program (DLAP)" (Research Triangle Park, NC: RTI International, Sept. 2009), p. 46.
http://www.tricare.mil/tma/20…