How to develop a report using year-to-date balance dimensions for payroll balances

Summary: We need to be able to generate effective OTBI reports delivering year-to-date information on payroll balances. When looking at Payroll Balance Results in the UI using "Person Results" screens, we are able to see balances for FIT Reduced Subject Withholdable in the Relationship NoCB Year To Date balance dimension, but are unable to report on that balance value. Thus far we've only been able to generate reports by returning the values for all year-to-date Balance Dates and displaying them aggregately, but that seems to be very inefficent, causing long-running reports, or reports "timing out"