*** percentage change is not meaningful . segment results 20142008 compared to 2007 in 2008 , the segment 2019s net sales were $ 12.1 billion , a decrease of 36% ( 36 % ) compared to net sales of $ 19.0 billion in 2007 . the 36% ( 36 % ) decrease in net sales was primarily driven by a 37% ( 37 % ) decrease in unit shipments