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Barcelona's airport handled 2.9 million passengers in 1991 ; this figure has now risen to over 21 million . Tourism , which accounted for less than 2% of the city's pre-Olympic GDP , is now worth 12.5% . The increase in hotel beds as a result of the Games has produced 12,500 new jobs . Barcelona estimated that in eight years it had built infrastructure that would usually take fifty years . They invested $8 billion in a ring road , a new airport , a telecommunication system , and an improved sewage system . The filthy harbour and port area were transformed by a $2.4 billion waterfront development , with the two tallest towers in Spain , one a luxurious hotel , the other an office building
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