With the limited data set provided and the addition of two lines of
code (Next i and End Sub) at the end of the code provided, Excel
produced two graphs on separate sheets named for the respective
counties. The graphs appear to be plotted and labelled correctly.
The VB code did not "crash". I could not reproduce your problem with
the limited data set. I imported the data provided to 3 columns
beginning at Sheet1:A2 ensuring the number values in columns B and C
were numerical Type, not Text. Did you test it with the same data
provided here? If so, what are your results?