Hi Tom!
Thanks for taking an interest in my map. First off, this project was completed in MapInfo Pro and the graphs are actually just images taken from a market report and inserted into the map through the insert image tab on the layout menu.
As for your comment, I totally understand where you are coming from however, in this case I was primarily interested in the absolute number of individuals in each CT because I wanted to understand the actual number of potential clients in each region. Density maps were used to understand the distribution of potential clients across the region but were not included in this layout.
Cheers
-Karl