The Custom Line Chart resource allows you to easily view data as shown in percentage format. To customize it, simply click Edit in the upper right-hand corner of the resource.
Use the check box in the legend as a toggle to show/hide data on the chart. Clicking Export lets you to export the data to either an HTML or Excel file.
You can have the chart show a predetermined time period of data by clicking on any one of the three Zoom buttons in the head of the Zoom column. Alternatively, you can have the chart show a specific date range by dragging the mouse over an area of the chart. The time and date displayed at the top of the resource shows the amount of data currently loaded into the chart. This can be changed by clicking Edit from within the resource.