"This report was developed for The Office of National Drug Control Policy (ONDCP) which asked the Lewin Group to develop more current estimates of the societal cost of drug abuse. In the context of this report, we use the phrase 'drug abuse' to refer to consequences of using illicit drugs, as well as societal costs pertaining to the enforcement of drug laws. This study does not address costs related to abuse of or dependence on legal substances that may be termed drugs including alcohol and tobacco. The economic cost of drug abuse in 2002 was estimated at $180.9 billion. This value represents both the use of resources to address health and crime consequences as well as the loss of potential productivity from disability, death and withdrawal from the legitimate workforce. This estimate has incorporated extensive new data, although several major components have been trended forward."
Office of National Drug Control Policy: http://www.whitehousedrugpolicy.gov/