sentences:  It currently has approximately 7,300 employees at its Hamilton plant and produces over four million tons of steel annually, representing about 30% of Canada's flat rolled sheet steel shipments.Dofasco was purchased by Arcelor Mittal in January 2006, and in addition to being one of North America's most profitable steel companies, Dofasco has been named to the Dow Jones Sustainability World Index seven years in a row.Dofasco's wide range of steel products is sold to customers in the automotive, construction, energy, manufacturing, pipe and tube, appliance, packaging and steel distribution industries.