Funnel Charts with jqPlot

Funnel charts are used to show the progressive reduction of data as they go down one level to the next. The chart consists of an inverted pyramid, or funnel, divided into different levels. Each level has its own area, which is proportional to a given percentage value. A funnel chart is similar to a pie chart in that both express a whole divided into its constituent parts. But, the funnel chart specifies levels, which succeed one another in a very precise sequence. This sequence may express a hierarchical order, the steps of a process, and so on. A pie chart cannot do this.