Dan Tong: What does the X-axis represent in the graph:
MOST POPULAR CAMERAS in FLICKR COMMUNITY
Surely it must be time, but what units?
Please avoid this common mistake of not giving us the most basic and must have information to really understand what information is presented.
If you click on the graph, then you'll see Flickr's explanation of the X-axis. Spend some time researching before you start yelling at people.