With 1.35 billion users of its Internet social network, Facebook Inc would rank as the world’s second-most populous nation if it were a country. While its users may populate only a virtual country, Facebook says it generates a lot of real economic activity – $227 billion worth of economic impact and 4.5 million jobs in 2014, according to a new study by consulting firm Deloitte & Touche [DLTE.UL] that Facebook commissioned.