Amazon said Thursday that revenue from its cloud unit increased almost 24% in the fourth quarter, topping analysts' estimates. Amazon Web Services generated $35.58 billion in revenue, according to a statement . Analysts polled by StreetAccount had expected $34.93 billion. AWS represented about 17% of Amazon's total revenue for the quarter. Operating income within AWS came to $12.47 billion, more than StreetAccount's $11.91 billion consensus, accounting for most of its parent company's profits.