According to FECA Bulletin No. 24-03& 24-04, the cost-of-living adjustments granted to a compensation recipient is 3.3% under the FECA are based on the “Consumer Price Index for Urban Wage Earners and Clerical Workers” (CPI-W) figures published by the Bureau of Labor Statistics (BLS). The annual cost of living increase is calculated by comparing the base month from the prior year to the base month of the current year, with the percentage of increase adjusted to the nearest one-tenth of 1 percent. 5 U.S.C. §8146(a) establishes the base month for the FECA CPI as December.