The number of Americans alive with a history of cancer—a number now sitting at 13.7 million—will jump to almost 18 million by 2022, finds a new report from the American Cancer Society in collaboration with the National Cancer Institute.

The report finds that even though cancer incidence rates are decreasing, the number of cancer survivors is growing due to the aging and growth of the population, as well as improving cancer survival rates.

The report, published Thursday, says one in three women and one in two men in the U.S. will develop cancer during their lifetime. The three most common cancers among males living with a history of cancer in 2012 are prostate cancer (43 percent), colorectal cancer (9 percent), and melanoma (7 percent). Among women in 2012 with a history of cancer, the three most common cancers are breast (41 percent), uterine (8 percent), and colorectal (8 percent) cancer. In 2022, those proportions are expected to be largely unchanged.