Nested multi-series pie charts show two or more pie shapes one within another. Each pie shows the percent of each slice from the whole circular plain area, for a single-series. Each pie has the same number of slices and uses the exact same colors, for related points.
Our 2007/2008 Global Sales multi-series demo charts show two nested pies with sold product quantities in two different years: 2007 and 2008. Each pie represents a series, and each slice color is reserved for one of the three countries: US, France or UK.