Stuart, I'v been futzing around with price all night trying to somehow add it to this graph. Unsatified at my attempts to somehow relate the two in a chart that shows promise for a correlation. Any thoughts?
In Excel, under the Chart Menu, choose "Chart Type".  Select the "Custom Types" tab, and then choose "Lines on 2 Axes".  

Also, if you've already got a chart you can add another series on a second axis somewhere under the Data menu but I forget where.

Thanks. Excel isn't the problem I'm having, it's conceptualizing the relationship between price and production.  They move percentage-wise in magnitudes that are incompatible, so you have to dampen the price magnitude by several factors.

I've tried indexing them to a "100" number but then how do you choose what month corresponds to "100" for both except for arbitrarily?

Maybe I'll post some of my best aborted attempts later so you can see what I mean.

Maybe there isn't anything relevent we can draw from the two? Maybe there is, I just can't get a graph to show it.

That's why you want two axis - it lets you have both variables on difference scales on the same graph.
Yeah, you're right, I'm gonna try that next.