The demise of Blackberry

Oh, how the (once) mighty have fallen. This data on tutor2u could be used in many areas of Economics
http://www.tutor2u.net/economics/blog/shut-down-points-the-rise-and-fall-of-blackberry?utm_medium=email&utm_campaign=Economics%20daily%20digest%20Sat%201st%20October%202016&utm_content=Economics%20daily%20digest%20Sat%201st%20October%202016+CID_a553b90e92bc0818bd13f60ea1d7b06a&utm_source=CampMonitor&utm_term=Shut%20Down%20Points%20The%20Rise%20and%20Fall%20of%20Blackberry%20It%20has%20taken%20some%20time%20but%20since%202010%20the%20decline%20in%20market%20share%20for%20Blackberry%20handsets%20has%20been%20nothing%20short%20of%20calamitous%20The%20number%20of%20sales%20has%20collapsed%20from%20over%2050%20million