OPEN MINDS, The Behavioral Health & Social Service Industry Analyst Industry Statistics The public sector has played the greatest role in drug abuse treatment accounting for more than $5 billion of the $7.6 billion in drug abuse treatment expenditures. This represented 66.1% of national drug treatment expenditures in 1996. In addition, of the total $79.3 billion in 1996 mental health and other alcohol or drug abuse (MHAOD) treatment expenditures, approximately 6.3% ($5.0 billion) was for treatment of alcohol abuse. The remaining 84.1% of . . .