2012, Annie E. Casey Foundation: Since 1990, KIDS COUNT has ranked states annually on overall child well-being using an index of 10 indicators. Over time, we changed some of the indicators to replace weaker measures with stronger ones, but the overall scope of the list remained consistent. In this year’s Data Book, we have updated our index to take advantage of these advances in knowledge and the availability of new state-level data to create a more robust tool to better serve the needs of the field. Reliable state-level measures of childhood mental health, juvenile justice involvement and child maltreatment are either not regularly collected or are not collected in a sufficiently comparable form for inclusion in this index. Link to pdf Data Book