ECSENOMICS Demand for Addictive Substances by Casual Users T40 Figure 5-5 s'(illegal drugs) illegal S(legal drugs) F G Quantity of addictive substance McGraw-Hilllrwin CopyrightC 2001 The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. Demand for Addictive Substances by Casual Users T-40 Figure 5-5