Charting data series with unequal number of data points

Thank you for the reply. I have uploaded the file, please look at the 2nd tab titled "Charts". The total time period for each series is the same, but the frequency is different. The 30yr treasury data is displayed from 1977 to the present, while the jobless claims data is only displayed from 1977 to 1983, due to it having far less data points. I would like this line on the graph to be displayed for the entire series.

Thank you,
Erik