Figure 1. Urban transit systems indexes of labor productivity, output, and hours worked, 2007–15
Date	Output	Hours worked	Labor productivity
2007	100	100	100
2008	103.64	103.87	99.78
2009	104.10	102.27	101.78
2010	101.55	102.15	99.41
2011	104.72	101.88	102.79
2012	107.04	101.78	105.17
2013	109.33	100.31	109.00
2014	110.59	105.18	105.14
2015	109.09	109.62	99.52
Source: U.S. Bureau of Labor Statistics.