This article documents behavioral heath expenditures and trends from 1987 to 1997.  Behavioral health spending increased by an average of 6.8 percent per year over that period and behavioral heath expenditures totaled $85.3 billion in 1997. 

Mark, T. L., Coffey, R. M., King, E., Harwood, H., McKusick, D., Genuardi, J., et al. (2000). Spending on mental health and substance abuse treatment, 1987-1997. Health Affairs, 19(4): 108-20. Copyright © 2000 by Project HOPE. 

Authors: Tami L. Mark, Rosanna M. Coffey, Edward C. King, Henrick J. Harwood, David C. McKusick, James Genuardi, Joan Dilondardo, Jeffrey A. Buck.

The full report is available from SAMHSA here: Spending on Mental Health and Substance Abuse Treatment, 1987-1997 (PDF | 155.17 KB)