Business was a-boomin' in the auto industry last year, and while a number of factors conspired to keep cars moving through dealerships, chief among them was discounts. How do we know that? This infographic contains part of the answer.

Compiled using data from car-shopping website CarWoo!, the infographic tells us which automakers gave the most discounts last year, where they were given, who got them, and more. Which automaker doled out the most discounts? Jeep, which CarWoo! says was selling its vehicles at a 17.7-percent discount in 2011. Which automaker also posted the largest percentage gain in sales last year? Jeep, whose sales jumped over 44 percent compared to 2010.

Mitsubishi and Kia, which posted the second and third largest percent increases in sales last year, also make CarWoo!'s list by having offered high discounts of 11.7 and 12.1 percent in 2011.

Big savings didn't always equal big sales, though. Infiniti, for instance, is on record offering discounts of 12.2 percent in 2011, but still saw its sales fall 4.8 percent.

Check out the rest of what CarWoo!'s infographic has to say about savings after the jump.

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