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May 2013, "Monthly Energy Review," US DOE/EIA, eia.gov
page 5, Table 1.2, "Primary Energy Production by Source"
"Coal"
US coal production in first two months of 2013 lower than same period in both 2012 and 2011:
Jan 2013, 1.702
Feb 2013, 1.554
Two month total, 3.256
=================
Two month total 2012, 3.664
Two month total 2011, 3.590
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