I am plotting data from 2006 and now starting to plot data from 2007 in
a line chart. I would like the line from 2006 to be a solid line, and
the line from 2007 to be a dotted line. This is measuring the same
data, just in different years. When i try to add a different series,
the new line for 2007 appears, and the 2006 line disappears. I'm not
sure how I get both of them to appear at the same time. Any idea what
I'm doing wrong?

B