Excel 2007 : Excel 2007 - adding second set of data to graph

[FredSDCA]

Hello All,
New to the forum and I ran a search on this but couldn't find anything relevant in 5 pages (may have searched the wrong keywords).

I'm trying to add a second set of data to the end of a bar graph. The graph consists of project names and percentage completed. At the end of every bar, I'd like to add a project end date.

I attached a copy of what I'd like to do. I tried a (bad) workaround and added a temporary graph to the right of the original graph with just the project end dates then moved the dates over to the original graph (shown in the image).

Any help would be greatly appreciated!