Calculate maximum possible score for each of the 18 diagnoses to
support choice of scoring variable when an etiology and a
manifestation are both NRS casemix variables.
From field named CRNT_MGMT_INJCTN_MDCTN
Current: Management of Injectable Medications
valid values: 00 thru 02, NA - OASIS-B
00, 01, 02, 03, NA, sp(2) - OASIS-C