Given the task definition and input, reply with output. Given a passage and a question, find the answer to the question based on the passage. The answer should consist of only one word that lies in the span of only one of the sentences in the passage.

Paragraph: With the scientific data about the health risks of smoking and information about the effect of smoking on troop readiness , in 1975 , the United States Department of Defense discontinued the inclusion of cigarettes in K - rations and C - rations . By 1978 , the Department of Defense had implemented basic smoking regulations , including the designation of smoking and nonsmoking areas . In 1985 , the Department of Defense conducted a study that revealed that smoking rates of military personnel ( 47 % ) were significantly higher than that of US civilians ( 30 % ) and concluded that smoking had a negative effect on troop readiness . The report also cited an estimated tobacco - related healthcare costs as high as $209.9 million , and recommended potential methods to curb smoking in the military , including the elimination of tobacco products from stores , raising tobacco prices to civilian levels , and the implementation of an educational program to discourage smoking . In 1986 , the DoD Directive 1010.10 was issued by Secretary of Defense Caspar Weinberger , who announced , '' an intense anti-smoking campaign ... at all levels of all Services . '' It established a policy on smoking and other health risk behaviors such as alcohol consumption . The policy banned the use of tobacco during basic training , increased the number of designated nonsmoking areas , and prohibited health care providers from smoking on duty . The goal of the policy was to reduce all tobacco use rates to below that of civilians , and to reduce personnel and active duty rates from 52 % to 25 % by 1990 . In 1992 , the DeCA Directive 40 - 13 policy prohibited commissaries and exchanges from participating with promotions by tobacco manufacturers directed specifically at military personnel , and required commissaries to stock cigarettes in the back . In 1993 , the USS Theodore Roosevelt ( CVN - 71 ) became the first smoke - free Navy ship . By 1994 , the Department of Defense had implemented Directive 1010.15 which banned smoking in workplaces , designated outdoor smoking areas , and created the precursor of an education program that sought to distribute information to new personnel on the health effects of smoking and to encourage smokers to quit . Executive Order 13508 in 1997 banned smoking in all government - owned , rented , or leased interior spaces , but the Department of Defense approved a three - year phase - in period for their facilities and eventually implemented the ban on December 7 , 2002 . Despite these attempts , by 1988 , the smoking rate had only decreased to 42 % and far exceeded the rate of civilians . And although prevalence did decrease to 29.9 % from 1980 to 1998 , it has increased since then and appears to still be increasing .
Question: when did they stop putting cigarettes in rations
1975