You won't be able to to custom set PCI ranges that will show in a table in the front-end without hard-coding them.
The data you're showing in your table/chart is shown by a measure based on the connection of the data to your dimensions.
Because your PCI range dimension is shown as a string you won't be able to set custom ranges. (Unlike numerical values, where you can use <, >, = when making a selection, but still can't set custom PCI ranges that'll show in the table)