instruction: what was the minimum monthly number of patients who were diagnosed with ards - non-pulmonary etiology until 2104?
response: SELECT MIN(t1.c1) FROM (SELECT COUNT(DISTINCT diagnosis.patientunitstayid) AS c1 FROM diagnosis WHERE diagnosis.diagnosisname = 'ards - non-pulmonary etiology' AND STRFTIME('%y', diagnosis.diagnosistime) <= '2104' GROUP BY STRFTIME('%y-%m', diagnosis.diagnosistime)) AS t1