Funnel Chart

Funnel charts are a type of chart, often used to represent stages in a sales process and show the amount of potential revenue for each stage.
This type of chart can also be useful in identifying potential problem areas in an organization’s sales processes.
A Funnel charts displays values as progressively decreasing proportions amounting to 100 percent in total.
The size of the area is determined by the series value as a percentage of the total of all values.