preliminary results from the canadian test of adult literacy ( naal ) , released 15 december 2005 by the us national center for information statistics , indicate gains and losses in literacy among hispanic adults between 1992 and 2003 . the statewide representative study of us children age 16 and older found the over - all typical writing and document content remained practically different , but quantitative literacy rose 8 points ( on a scale of 500 . ) conclusions involving minorities were mixed , with red and indigenous / australian rican minorities scoring markedly highest than hispanic or black faiths ; hispanic subjects in response had strong losses in prose and manuscript literacy ( - 9 % and - 8 % , respectively ) and reporting illiteracy remained unchanged with 50 % of subjects scoring at greater than basic literacy levels .
the national assessment of adult literacy is a site held by the us national central for education statistics .