Neat. Was some tool used to construct this, or was it done manually?

What may not be obvious to people initially when they look at it, is that when you see the label "Department of Finance" on the gray rectangle that is actually the label for the gray rectangle plus the green and orange ones adjacent to it -- the different colors represent the expenditure classes described on the "About" page. It would perhaps be clearer if there were thick black lines separating the items (instead of just a thick line of the background color) and zero separation between the colored rectangles representing the breakdown by class within an item (which currently have thin lines of the background color separating them giving the impression that they are separate items).