In 2009, there were 401 active primary wood-processing mills in Missouri, 12 more mills than in 2006. However, between those years, the number of sawmills that process more than 1 million board feet decreased by 20 mills, and the total volume processed decreased by more than 20 percent. Industrial roundwood harvested decreased by 18 percent, from 125.5 million cubic feet in 2006 to 102.6 million cubic feet in 2009. Of the harvested volume, 95.6 million cubic feet was used by primary wood-processing mills in Missouri and 7.0 million cubic feet was sent to primary wood-processing mills in other states and countries. Saw logs accounted for 90 percent of the total harvest. The harvesting of industrial roundwood produced 71.6 million cubic feet of harvest residues. Primary wood-processing mills generated 1.5 million green tons of mill residues. Five percent of the mill residues generated were not used for other secondary uses.