Sales of heavy trucks, those weighing over seven tons, peaked at a seasonally adjusted rate of 555,000 in 8/06, but then buckled in the Great Recession to 181,000 by 5/09. Sales then quickly recovered to 479,000 by 6/15 then fell to just 370,000 in 7/16 due to the oil price collapse. Since then, sales have flattened and now stand at 374,000. Hopefully, the oil related sales collapse is over.