what is the yearly maximum intake of sc 24 fe ng that patient 21454 is getting until 438 days ago?
select max(inputevents_cv.amount) from inputevents_cv where inputevents_cv.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 21454 ) ) and inputevents_cv.itemid in ( select d_items.itemid from d_items where d_items.label = 'sc 24 fe ng' and d_items.linksto = 'inputevents_cv' ) and datetime(inputevents_cv.charttime) <= datetime(current_time,'-438 day') group by strftime('%y',inputevents_cv.charttime)