Nested multi-series doughnut charts show two or more doughnuts one within another, with a final hole left in the middle. Each doughnut shows the percent of each slice from the whole circular area, for a single-series. Each doughnut 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 doughnuts with sold product quantities in two different years: 2007 and 2008. Each doughnut represents a series, and each slice color is reserved for one of the three countries: US, France or UK.