In 1999, the peak of the film-camera industry, consumers took around 80bn photos (according to Kodak). We're taking far more now, but how many more?
* Facebook said in May 2015 that two billion photos are shared on its systems every day, by 1.4bn users - a 730bn/year run-rate.
* This does not include WhatsApp, which in April 2014 it said it was seeing 700m photos a day from 500m users (255bn a year) - it seems pretty likely that that number has risen since.
* Snapchat gave a number of 700m a...