A chart shows the number of prostate cancer incidents in Boone County, Missouri, from 2016 through 2020. The prostate cancer incidents are broken down by age group. There were 7 incidents of the cancer in the 0-49 year old age group, 137 cases in the 50-64 age group, 277 cases in the 65-84 age group, and 15 in the over 85 age group.