A Picture of a Percentage

Percentages used to be the norm for explaining how a whole was broken into parts.  Well, they still are except you don't get the % sign as much.  This chart doesn't have any percentages listed on it but it's still the same as a pie chart.  You also don't have to have a legend box.  I'm sure they have a special name but I don't know what it is.

From Washington Post, released by Blue Shield of California: