Although cancer remains the No. 2 killer of Americans, cancer rates are down, largely because the number of people who smoke continued to decline to record lows in 2016.
In November, a report from the Centers for Disease Control and Prevention found that from 2005 to 2015, smoking among adults declined from 20.9 (45.1 million people) to 15.1 percent (36.5 million). The overall rate fell 1.7 percentage points last year alone, resulting in the lowest prevalence since the CDC began collecting data in 1965.
Experts say that because fewer people are smoking, cancer is being detected earlier and new treatments have been developed recently.