Graphical representation of multi-level data (pie of pie of pie)

Hi, all…first post!

I’ve searched (and searched, and searched), but can’t seem to find exactly what I’m looking for. Apologies if I've missed it.

I have a series of hierarchical data that I’d like to represent graphically.

Conceptually, it looks like this (with pretend percentages):

-A represents 100%
--Of A, 10% is B and 90% is C
---Of C, 20% is D and 80% is E
----Of E, 30% is F and 70% is G
-----Of G, 40% is H and 60% is I

In plain English, something like, “I have 100 A. Of those, 90% are C. Of those, 80% are E. Of those, 70% are G. Of those, 60% are I”.

I thought that a multi-level exploded pie charts would be perfect (even if the sizes aren’t accurate). But, I’m having trouble creating it. I’ve tried various combinations of Pie of Pie and Bar of Bar charts, but they don’t allow multi-level nesting. The cascading pie charts on this page are similar to what I envision: http://chandoo.org/wp/2012/11/09/pie...-of-pie-chart/

I’ve even thought about simply having dynamically-sized shapes (like circles within circles) based on the percentage values (Circle A is 100%, circle C is 90% of A, circle E is 80% of C, and so on…).

But, I’m posting here, because thus far, I’ve failed.

Any advice or help is appreciated. Thanks!

I put this together to show what one possible visualization might look like. Ideally, each pie size would be scaled to accurately show that it represents a subset of the previous pie.

Thoughts? Should I pursue this way, or present the data in a different way, entirely? Thanks!