Breast Cancer Statistics | Susan G. Komen® - Population for breast cancer
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Table 4. Factors That Increase the Relative Risk for Breast Cancer in. Women .. counties. Note: Rates are age adjusted to the US standard population. Breast cancer is the most common cancer in American women, except for skin cancers. Currently, the average risk of a woman in the United States developing breast cancer sometime in her life is about 13%. The American Cancer Society's estimates for breast cancer in the United States.