Not sure if this was ever posted, but a very interesting read. It shows Windows and Android with less vulnerabilities than iOS and Mac OSX in 2015.
http://venturebeat.com/2015/12/31/s...lnerabilities-in-2015-mac-os-x-ios-and-flash/
http://venturebeat.com/2015/12/31/s...lnerabilities-in-2015-mac-os-x-ios-and-flash/