what was the daily maximum amount of chest tubes cticu ct 1 given to patient 86791 in 09/last year?
select max(outputevents.value) from outputevents where outputevents.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 86791 ) ) and outputevents.itemid in ( select d_items.itemid from d_items where d_items.label = 'chest tubes cticu ct 1' and d_items.linksto = 'outputevents' ) and datetime(outputevents.charttime,'start of year') = datetime(current_time,'start of year','-1 year') and strftime('%m',outputevents.charttime) = '09' group by strftime('%y-%m-%d',outputevents.charttime)