Figure 1. Graph shows the help-wanted index of pediatric radiology from 1991 to 1999. The raw data are represented by the bars, and the 12-month rolling average is represented by the connected line of diamonds. The first 11 months are an average of the first months in the series because data were available for only 11 months of the 1st year. Note that the most recent raw numbers have exceeded the previous peak from 1992, whereas the rolling average is approaching this peak.