How do I create a cumulative median field in SAS VA 7.4 Designer?

[centezz]

Consider a List Table in VA 7.4 Designer. It has only two fields (Month, Median Patients). The desire is to calculate the cumulative median over the months. This cumulative median is labelled as "Median Patients". An example data with more descriptive steps is attached.

Please, take look. Note: It's easy to calculate the monthly Median Patients by just using the median function in VA 7.4 Designer (not the desire). The cumulative median is desired.

Thank you and have fun.

[FredrikE]

I am pretty sure it's not possible in 7.4.

//Fredrik