Months since Previous Mammogram
The number of mammograms performed nine months after the previous mammogram is small. The chart rises sharply, with nearly 250,000 mammograms performed 12 months after the previous one, then drops sharply after that. At both the 11- and 13-month marks, there were over 100,000 mammograms performed. The chart rises again to a smaller peak, still below 50,000 mammograms, at the 24-month mark, then tapers off, with still smaller peaks at 36, 48, and 60 months.