Chapter 3 
Figure 1 
Sales-weighted average tar and nicotine deliveries, 1 954-1 993 
All Domestic Brands on U.S. Market 
Key: RT = reconstituted tobacco; F = filter; ET = expanded tobacco. 
Source: Hoffmann and Hoffmann, 1994a. 
paper, reconstituted tobacco, filter tip ventilation, and use of expanded 
tobacco. Similar developments occurred in most industrialized countries, 
albeit at a somewhat slower pace and about 5 to 10 years after the 
introduction of these changes in the United States (Hoffmann and 
Hoffmann, 1994b; Jarvis and Russell, 1985; U.S. Department of Health 
17 
Nicotine (mg) 
