Navigate to Analytics -> Netcopy Analysis. Select the historical dates (up to the previous 30 Issue dates) from the drop down menu and any Location Types and Categories, if you want to filter by any of those groups specifically. Click the View Report button () to refresh the report with the selected parameters. The report will display the current draw, overall netcopy average (based on the selected dates) and the netcopy pick up for each date as well, for each location.
From here it's best to export the report to excel (or other spreadsheet) program.
To export the Report, click on the Export Menu button () and select the format you wish to export the report too.
Now working in the spreadsheet, sort the Overall Average column from lowest to highest to see the worst performers at the top.