Looks like it wants me to be a paying member . . .
And it doesn't seem to want to give me more than five years worth of graph.
Yes, it does push their premium service (don’t they all?), but they offer a lot on their free service. At least some stocks have more data available. On this chart I have asked for 40 years (in the url), but they only show 35:
http://stockcharts.com/h-sc/ui?s=IBM&p=D&yr=40&mn=2&dy=0&id=p42576307613
Good luck. If you find something better, let us know.
nacl