Figure 1.

Geographic distribution of age-adjusted breast and cervix cancer mortality rates and the populations at risk. For the two top maps, the fill color in each county represents the age-adjusted mortality rates per 100,000 person-years recorded over the period 1970–1994 for white females (class boundaries correspond to deciles of the histogram of rates). The middle maps represent the population at risk which was back-calculated from the rate and count data (lognormal scale). The bottom map represents the population at risk for black females (BF) which was back-calculated from the "all cancers" age-adjusted rate and the count data.