context: Audis sales grew strongly in the 2000s, with deliveries to customers increasing from 653,000 in 2000 to 1,003,000 in 2008. The largest sales increases came from Eastern Europe (+19.3%), Africa (+17.2%) and the Middle East (+58.5%). China in particular has become a key market, representing 108,000 out of 705,000 cars delivered in the first three quarters of 2009. One factor for its popularity in China is that Audis have become the car of choice for purchase by the Chinese government for officials, and purchases by the government are responsible for 20% of its sales in China. As of late 2009, Audis operating profit of €1.17-billion ($1.85-billion) made it the biggest contributor to parent Volkswagen Groups nine-month operating profit of €1.5-billion, while the other marques in Group such as Bentley and SEAT had suffered considerable losses. May 2011 saw record sales for Audi of America with the new Audi A7 and Audi A3 TDI Clean Diesel.  In May 2012, Audi reported a 10% increase in its sales—from 408 units to 480 in the last year alone.
question: By how many units did Audi increase in 2012?
answer: 72