Construction Economics: Lumber Prices

ENR’s 20-city average cost indexes, wages and materials prices. Historical data and details for ENR’s 20 cities can be found at ENR.com/economics
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December 15, 2015
In Construction Economics sections of both the December 14, 2015 and December 21, 2015 issues of ENR the Construction Cost Index value for December 2015 is the exact same number (10092.38) as the published number for November 2015, yet you are showing an increase of 0.6% for the month. What's the correct number for December 2015?