IABによると、2017年のアメリカのインターネット広告費は前年比21％増の880億ドルだった。
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Digital Ad Spend Reaches an All-Time High of $88 Billion in 2017, With Mobile Upswing Unabated, Accounting for 57% of Revenue
https://www.iab.com/news/digital-ad-spend-reaches-all-time-high-88-billion-2017-mobile-upswing-unabated-accounting-57-revenue/
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Digital Ad Spend Reaches an All-Time High of $88 Billion in 2017, With Mobile Upswing Unabated, Accounting for 57% of Revenue
https://www.iab.com/news/digital-ad-spend-reaches-all-time-high-88-billion-2017-mobile-upswing-unabated-accounting-57-revenue/
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