In July, the Consumer Price Index (CPI-W) rose to 637.138, still well below the July 2008 index of 644.303 (upon which the last COLA increase was based). The CPI-W needed to rise above 644.303 before another COLA was due. After the final month of the six-month measuring period, the eighth and final COLA under the 2006 National Agreement and the Operating Services Agreement is zero. read more