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The following table sets forth our revenues, operating costs and expenses, income from operations and other financial data as a percentage of our total revenues for the periods indicated. 

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Each of our operating segments is managed separately because each represents a strategic business unit that serves a different market. We measure our segment performances mainly based on revenues and income before tax. 

Due to the change in policy for collecting the tariffs for fixed line-to-mobile calls starting from 2011 as discussed in “Domestic Fixed Communications Business”, “Interconnection” and “Regulation—Interconnection Arrangements” of “Item 4. Information on the Company—B. Business Overview”, our domestic fixed communications revenues and cost of revenues increased in 2011, while mobile communications revenues for the same period decreased. 

