(Note this article is from 2011)
"At the dawn of the new millennium a new technology (that Kodak itself invented) was reshaping the whole industry - the digital photo. When the first few hundred thousand digital cameras shipped in 1997 their memory was strictly limited (in fact cameras like the Sony Mavica took floppy disks!). Digital cameras are now ubiquitous - it is estimated that 2.5 billion people in the world today have a digital camera. If the average person snaps 150 photos this year that would be a staggering 375 billion photos. That might sound implausible but this year people will upload over 70 billion photos to Facebook, suggesting around 20% of all photos this year will end up there. Already Facebook’s photo collection has a staggering 140 billion photos, that’s over 10,000 times larger than the Library of Congress."