Preliminary results from the National Assessment of Adult Literacy (NAAL), released 15 December 2005 by the US National Center for Education Statistics, indicate gains and losses in literacy among minority adults between 1992 and 2003.  The nationally representative study among US adults age 16 and older found the over-all average prose and document literacy remained relatively unchanged, but quantitative literacy improved 8 points (on a scale of 500.) Results among minorities were mixed, with White and Asian/Pacific Islander minorities scoring significantly higher than Hispanic or Black ethnicities; Hispanic subjects in particular had sharp decreases in prose and document literacy (-9% and -8%, respectively) and quantitative illiteracy remained unchanged with 50% of subjects scoring at less than basic literacy levels.