The rates of people aged 50 to 59 who admit to using illicit drugs in the past year nearly doubled from 5.1 percent in 2002 to 9.4 percent in 2007 while rates among all other age groups are the same or decreasing, the U.S. Substance Abuse and Mental Health Services Administration reported.

“These findings show that many in the Woodstock generation continue to use illicit drugs as they age,” SAMHSA Acting Administrator Eric Broderick said in a statement.