what was the first height of patient 630 in 06/last year.
select chartevents.valuenum from chartevents where chartevents.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 630 ) ) and chartevents.itemid in ( select d_items.itemid from d_items where d_items.label = 'admit ht' and d_items.linksto = 'chartevents' ) and datetime(chartevents.charttime,'start of year') = datetime(current_time,'start of year','-1 year') and strftime('%m',chartevents.charttime) = '06' order by chartevents.charttime asc limit 1