This function will return the maximum value from a list of finding
Occurrence Counts, across multiple findings, the format is:
MAX_VALUE(I,"CSUBI",J,"CSUBJ",K,"CUSBK",...) where I, J, and K are
finding numbers and "CSUBI", "CSUBJ", and "CSUBK" are the CSUBs of
interest for those findings.
CSUBs. Note that the selected CSUBs must be numeric: any that are not
numeric will be treated as having a value of 0.
To find the maximum for all occurrences, as specified by the
Occurrence Count, of a CSUB of a single finding, the format is:
MAX_VALUE(N,"CSUB") where N is the finding number.
To find the maximum value for all occurrences, as specified by the