Auto sales for 2010 are expected to come in at 11.5 million, a significant drop from the 17.5 million in 2000. A better job market expected to push the unemployment rate down a bit to 9.7% from 9.8% in November will help, but not by enough. Credit Suisse analyst Christopher Ceraso says each percentage point that the rate is above normal ( about 5%) keeps sales back by about a million auto sales on an annual basis. To get sales back to a 16 million range this would require an unemployment rate of 6%. Economists expect a better US economy in 2011 but the prospects remain uncertain for 2012, bringing unemployment down to about 8-9% if hiring picks up. The other concerns are high consumer debt and a rise in gasoline prices. If gas prices rise and buyers shift back to smaller vehicles, as they did in 2008, this would squeeze margins and profits. This is especially a concern as automobile companies have increased profits with a larger truck and large size vehicle component of sales, in a reverse shift after the shift to smaller cars in 2008-2009. Ford Motor is one example of this. It helps Ford use the extra profits to reduce its debt load but automakers have to be prepared for a sales shift to smaller cars in the face of higher gas prices....