Research by Blue Cross Blue Shield reveals nearly half of millennials have been diagnosed with major depression. However, one in five of them don’t seek treatment. According to Business Insider, millennials are less healthy than Gen Xers were at their age, and more likely to be less healthy as they grow older. Major depression diagnoses are rising at a faster rate for millennials and teens compared to any other age group. Since 2013, millennials have seen a 47% increase in major depression diagnoses. The overall rate increased from 3% to 4.4% among 18 to 34 year olds.The researchers say millennials’ poor health may be a product of rising healthcare costs, as more millennials than baby boomers have declined medical or dental treatment because it was too expensive.