Source: The Kaiser Family Foundation and the Sonderegger Research Center,
Prescription Drug Trends, A Chartbook Update, November 2001, Exhibit 23, at
http://www.kff.org/insurance/3161-index.cfm, updated by the Kaiser Family Foundation with retail prescription price data from the National Association of Chain Drug Stores website (
www.nacds.org) and manufacturer price data from personal communication, IMS Health.