Does anyone know how many people actual open an email in the Gmail app istelf?

Litmus market share says Gmail is 16% but doesn't differentiate between desktop, web or whether they're using the native Android or native Iphone mail apps to open emails.
http://emailclientmarketshare.com/

I'm trying to figure out how much of a problem the lack of media queries is and whether email should be designs should be limited to avoid their need.