†Source: McCloskey Coal Information Service. Prices for 1991-2000 are the average of the monthly marker, 2001-2011 the average of weekly prices.
‡Source: Platts. Prices are for CAPP 12,500Btu, 1.2 SO 2 coal, fob. Prices for 1991-2000 are by coal price publication date, 2001-2011 by coal price assessment date.
Note: CAPP = Central Appalachian; cif = cost+insurance+freight (average prices); fob = free on board