instruction: since 2105, what was the monthly maximum value of the mcv of patient 002-76990?
response: SELECT MAX(lab.labresult) FROM lab WHERE lab.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '002-76990')) AND lab.labname = 'mcv' AND STRFTIME('%y', lab.labresulttime) >= '2105' GROUP BY STRFTIME('%y-%m', lab.labresulttime)