give me a total of patient 25312's output until 04/05/2105.
select sum(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 = 25312 ) ) and strftime('%y-%m-%d',outputevents.charttime) <= '2105-04-05'