count the number of cases of laparotomy nec during this year.
select count(*) from procedures_icd where procedures_icd.icd9_code = ( select d_icd_procedures.icd9_code from d_icd_procedures where d_icd_procedures.short_title = 'laparotomy nec' ) and datetime(procedures_icd.charttime,'start of year') = datetime(current_time,'start of year','-0 year')