Mississippi had approximately 18,580,000 acres (7,519,000 hectares) of forested land in 2002, about 60% of the total land area of the state. Six national forests extend over 1.1 million acres (445,000 hectares). The state's most heavily forested region is the Piney Woods in the southeast. Of the state's total commercial timberland, 90% is privately owned. Some of this land was also used for agricultural purposes (grazing). Lumber production in 2002 totaled 2.5 billion board feet (8th in the US).