calculate how many times patient 96833 went to the intensive care unit in this year.
select count( distinct icustays.icustay_id ) from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 96833 ) and datetime(icustays.intime,'start of year') = datetime(current_time,'start of year','-0 year')