The Donut Chart displays data of one series in a donut with each piece being the size of proportioned amount of the total amount:
Expected Data and Graph Designer
The Donut Chart expects data in a two column format such as:
In the Graph Designer you can then select the column you want to use for your x-axis, which in this case is the different sections of the donut:
Hence, the x-axis column does not need to be the first column. However, for consistency purposes it is recommended to always use your first column for the x-axis.
The size of each donut piece will be automatically calculated and if you activate the tooltip, which you can do in the Graph Designer:
You can see the exact percentage as well as the absolute amount for each donut piece: