In order to accurately compare the dollar value of expenditures on tobacco products and smoking supplies across time the data were Examine the first FRED graph. In order to accurately compare the dollar value of expenditures on tobacco products and smoking supplies across time the data were adjusted for the price index of tobacco products and smoking supplies. adjusted for the all-items price index for all urban consumers. transformed into an index with a value of 100 for the base date. transformed into a year-to-year percent growth rate