Infographic: Where Google Made Its Billions in 2011

Google‘s earnings for the fourth quarter of 2011 were regarded as enough of a disappointment to send its stock tumbling about 8 percent after the numbers were announced on Thursday, but the search behemoth still pulled in $37.9 billion in revenue over the course of the year — 96 percent of which came from advertising, according to research conducted by search engine marketing software provider WordStream. WordStream has released an infographic detailing where those billions came from, based on its own analysis of the financial reports and the company’s own trillion-keyword database. By this study, 10 industries’ ad spending accounted for 60 percent of Google’s 2011 revenue, with finance and insurance topping the list at $4 billion in spending.