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(CNN) - Auto sales are stuck in high gear, and that's a good speed for automakers.

The January numbers just came out, showing another strong month for sales.

General Motors is still number one in sales but Ford Motor Company led the way in growth with 22 percent. The Chrysler Group is reporting gains too.

December was also a strong month for automakers, topping off a year that saw overall sales rise 13 percent.

That's the biggest increase since 1984.