Percent Stacked Area Chart

The Percent Stacked Area Chart consists of several Area series consecutively stacked on top of one another. Values along the Y-axis range between 0 and 100%.
The height of each series is determined by its contribution to the sum of all values in a certain category (on the X-axis). Percent Stacked Area Charts are a great way to follow the variation of each of several variables simultaneously as well as their percentage ratio over time.
This chart type should be employed only if there are more than two series, but the number of series should remain not too large because this may complicate the chart's legibility.