To control the data that appears in a widget e.g. in a graph or a table, double click on it to open the properties panel and choose the Data tab. This will show all the fields / indicators that are available in your feature service for displaying. A number of fields may be pre-selected. It is usually best to click on ‘select none’ and then pick the indicators required.
By default a widget will only show data for the selected area. In some instances though you may want to show data for all your areas so you can see how the selected area compares to the other areas. Check ‘Show All Areas?’ to achieve this.