Inflation-adjusted spending on DTCA in the U.S. and Canada, all media, 1995 to 2006 (CAD$ millions)*.

CAD = Canada; USA = United States.*inflation-adjusted spending expressed in equivalent of year-2006 dollars.†includes both unbranded disease-oriented advertising and corporate image advertisements.**US data converted to CAD$, using year-2006 Purchasing Power Parity (general GDP PPP).References, US data: 1995: Rosenthal et al. 2002 [8], calculated from Figure 1; 1996: Donohue et al. 2007 [9]; 2006: IMS Health. Total US promotional spend by type, 2007. www.imshealth.com/deployedfiles/imshealth/Global/Content/StaticFile/Top_Line_Data/PromotionalSpendChartWebsite.pdf.All other Canadian and US data from TNS Media Inc.