This is my last charting example from the Bain and Company white paper last year The Great Eight: Trillion-Dollar Growth Trends to 2020. The Marimekko chart below shows where US consumers spent their money in 2009:
The Marimekko chart illustrates how small a proportion of our spending is on tech-intensive products or services through the red highlighting. It also shows how you can fit a great deal of information into a Marimekko chart. This chart has eight categories/bars and about 46 individual segments. It provides the detail you need to believe the conclusion.
This is a good example of how you can use a Marimekko to drill down. The authors broke spending into eight major categories to make the individual segment items easier to identify and estimate their relative size.