Commodity200520062007200820092010
Furnace burners for liquid fuel$6,456$11,177$44,889$42,093$206$17,519
Furnace burners other than those for liquid fuel, incl. combination burners ...$8,026$12,039$44,622$56,287$398,569$128,992
Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ...$1,982$958$8,798$1,431$12,327 
Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ...$14,009$16,640$21,168$5,924$630,743$82,524
Total$30,473$40,814$119,477$105,735$1,041,845$229,035