what is patient 15754's yearly minimum level of protein, total since 2105?
select min(labevents.valuenum) from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 15754 ) and labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'protein, total' ) and strftime('%y',labevents.charttime) >= '2105' group by strftime('%y',labevents.charttime)