I'll post a few articles and I'll let you figure things out.
"Google earns 80% of its mobile revenue from iOS, just 20% from Android"
http://appleinsider.com/articles/12/03/29/google_earns_80_of...
"Despite Smaller Share iOS Devices Generate 67 Percent Of Mobile Internet Traffic"
http://marketingland.com/report-despite-smaller-share-ios-de...
"More (Local) Searches Coming From iOS Than Android"
http://searchengineland.com/more-local-searches-coming-from-...
"Two-Thirds of Google’s Mobile Search Traffic Comes From iOS Devices"
http://www.mobilemarketingwatch.com/two-thirds-of-googles-mo...