Interesting chart... I'll be watching it to see how things are going with 3D. I read somewhere not too long back that 3D has always been an up and down fad with movie fans, but now that we have it in our homes, I'm thinking (hoping) that might change.
There have been talks about lowering the 3D ticket price and increasing the 2D tickets so they are the same. This will affect the charts if that ever happens.