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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: J Occup Environ Med. 2014 Oct;56(0 10):S18–S22. doi: 10.1097/JOM.0000000000000260

FIGURE 2.

FIGURE 2

Percentage of examined US underground miners with coal workers’ pneumoconiosis (ILO category 1/0+), 1970–2012. Data are shown as 5-year moving average, with separate plots for various tenures in coal mining. Data are from NIOSH CWHSP.19