You can specify how to sort the data for series and categories. By default, the data is sorted in ascending order.
To specify how to sort the data for series and categories in a graph:
Select Properties from the graph's pop-up menu and then select the Axis
page in the Properties view.
Select the axis for which you want to specify sorting.
Scroll to Sort, the last option on the Axis page, and select Ascending (order), Descending (order), or Unsorted.