Hi stry. The trick is in the chart wizard. Select the two sets of data, click the chart wizard, choose line graph (not scatterplot), then click the 'series' tab and at the bottom define a range for the “Category (x) axis labels” option by highlighting your cells with the years in them. Follow the rest of the prompts through the wizard as normal to generate the chart. Let me know if you have any problems.
"Maturity is stupid." - Benjamin Franklin