Display connected records in a pie chart?

I have three tables: contact, organization type, and memberships. See attached data model.

Contacts is connected to organization type

Every contact has one type of organization (private, non-profit, etc.)

Memberships are connected to contacts

Contacts can sign up for memberships each year (2015, 2016, etc)

I simply want a pie chart that summarizes organization types by membership year. Therefore, I want to create a pie chart based on memberships, but summarizing based on linked fields.

I've figured out how to create a table report very easily... see attached graphic.

From what I can tell, you can't construct pie charts from arbitrary fields in connected records. Is that true, or am I missing something major?