 In the period from fall 2006 through spring 2009, the most recent three-year period under the new grading policy, A's accounted for 40.1% of grades in undergraduate courses, down from 47.0% in 2001–04, the three years before the faculty adopted the policy.The 2006–09 results also mark continued deflation from those reported a year ago, when A's accounted for 40.4% of undergraduate grades in the 2005–08 period.In humanities departments, A's accounted for 44.1% of the grades in undergraduate courses in 2006–09, down from 55.6% in 2001–04.