You're seeing a rendering error. This is what the graph is supposed to look like: http://i.imgur.com/xLEu0yM.png http://i.imgur.com/xLEu0yM.png The error on my

You're seeing a rendering error. This is what the graph is supposed to look like: http://i.imgur.com/xLEu0yM.png http://i.imgur.com/xLEu0yM.png The error on my browser (Firefox 34) made it look like 80% of the people were asleep by 9PM, hilariously enough. This is the erroneous rendering on my end: http://i.imgur.com/dOEWFkP.png http://i.imgur.com/dOEWFkP.png