The data label should be the same as the table source for the visualization. In this case, the Email Form Submission Rate is 1.72%, but in the visualization settings there is no option to show that 1.72% on a static view of the bar chart. When I'm in workspace, I can hover over the bar and the data label will pop up. But for the purpose of sending out (pdf) reports, it is necessary to show the data label in a static view.