U.S. households without children spent 19% more on liquor and wine, and 14% more on vitamins than average American households during the 52 weeks ending June 28, 2008, according to Nielsen.
Although households are often assumed to be conventional families with children, most U.S. households do not have children under the age of 18.  In fact, households without children account for roughly 65% of all U.S. households. 
According to Nielsen, these households represent 77.5% of liquor and wine dollar sales, 74% of vitamin dollar sales, and 73.6% of floral/gardening product and tobacco dollar sales.
Other categories skewing to households without children include medications/remedies, …