"...The ninth and final cost-of-living adjustment as negotiated under the 2006-2011 National Agreement is $978 annually, based on the July Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) announced Aug. 18 by the U.S. Bureau of Labor Statistics...."
Reference: www.nalc.orgCheck the NPMHU National Site to See if There is a COLA Update