… at the University of Michigan, Ann Arbor, under a grant from the National Institute on Drug (NIDA), part of the … of 10th-graders, and 21.6 percent of 12th-graders, down from the 2006 rates of 8.7 percent, 19.9 percent and 25.4 … email requests to 240-645-0227 or drugpubs@nida.nih.gov . Online ordering is available at …