 The results were in marked contrast to those from 2002–03, when As accounted for a high of 47.9% of all grades.Deflation has varied by division, with the social sciences and natural sciences largely holding steady for the last four years.During that period, A grades have ranged from 37.1 to 37.9% in the social sciences and from 35.1 to 35.9% in the natural sciences.