The Office for People with Developmental Disabilities cites reforms over the past two years, including better incident reporting and investigations, for the decline from 2011 to 2012.
The agency recorded 12,175 abuse allegations and 4,978 serious incidents, including 1,606 possible criminal acts, in 2011. Complete 2012 data was not immediately available.
Commissioner Courtney Burke says the numbers show progress, though much work remains.
Critics say the state needs to do more, including installing video cameras to deter staff from harming or neglecting disabled residents.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.