TWRoO on 07 October 2010
I wish things like region covered were not specified in the bit at the bottom no-one reads.... and unless they collected for Mexico and Canada and averaged them out I don't think this is quite representative of N.America anyway (I think it is likely it's just U.S.A.... even though until the last paragraph you could be forgiven for thinking it mean the world)
Anyhow, interesting to see the graph of how things are moving.
