Figure 7D. Index of direct hours, subcontractor hours, and total labor hours in industrial construction, 2006–16 (base year 2006 = 100)
Year	Direct hours	Subcontractor hours	Total hours
2006	100.00	100.00	100.00
2007	96.31	99.83	99.36
2008	98.55	98.78	98.75
2009	96.28	86.88	88.15
2010	96.85	84.99	86.59
2011	97.95	89.20	90.38
2012	108.01	94.49	96.31
2013	111.07	98.66	100.33
2014	108.26	104.01	104.59
2015	113.46	108.76	109.40
2016	116.75	113.72	114.13
Note: The recession period is from December 2007 to June 2009, as determined by the National Bureau of Economic Research. Source: U.S. Bureau of labor statistics.