Commodity2005200620072008200920102011
Furnace burners for liquid fuel$356,690$309,717$441,775$535,182$423,972$603,204$571,660
Furnace burners other than those for liquid fuel, incl. combination burners ...$1,073,506$965,030$899,807$955,419$766,456$668,253$798,528
Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... $365$579,418$328,796$650,194$1,540 
Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ...$859,379$821,507$1,141,207$2,130,277$506,176$739,495$1,325,475
Total$2,289,575$2,096,619$3,062,207$3,949,674$2,346,798$2,012,492$2,695,663