From Ann Robbins at DSHS,
"I know some folks have been interested in the use of client data in the formula allocation for state services for 2007 (sept 2006 - august 2007) given the rawness of ARIES data and the issues with imports that we have. In light of this, the formula was run with client data from 2004 (specifically, the months of January, August and December of 2004). These data are more stable"