Pivot Charts

Hi,

I've got a huge amount of data stored in a pivot table that I'm trying to graph.

There are 26 different variables, and essentially a value by week for each of these.

I'm new to Pivot charts so forgive me if this seems like an easy question - but my problem is that I can't seem to choose which variables to chart? Ideally I want 5 or 6 different graphs with similar variables grouped together on each. Is this possible?