As used in the Attendance for Success Act [Chapter 22, Article 12A NMSA 1978]:
D. "chronic absence rate" means the percentage of students, in the aggregate and disaggregated by the subgroups required for reporting pursuant to the federal Every Student Succeeds Act, in a public school and a school district who have been enrolled for at least ten days and who have missed ten percent or more of school days since the beginning of the school year.