In order to carry out the policy stated in Section 396, each county welfare department or probation department shall report to the State Department of Social Services, in the frequency and format determined by the department, foster care characteristic data and care information deemed essential by the department to establish a foster care information system. The report shall include, but not be limited to, elements that identify the factors necessitating foster care placement, the appropriateness of the placement, and the case goal or objective such as reunification, adoption, guardianship, or long-term foster care placement.