The Annenberg School for Communication and Journalism was ranked 1st in 2014 by USA Today.  In its 2016 rankings, U.S. News & World Report rates USCs University of Southern California Law School as 19th, the Marshall School of Business tied for 10th in undergraduate education with the USC Leventhal School of Accounting 6th, the Lloyd Greif Center for Entrepreneurial Studies 3rd, and the MBA program tied for 25th. Marshall no longer appears among the previewed Top 9 undergraduate business schools.; the Keck School of Medicine of USC was ranked tied for 31st in research and tied for 72nd in primary care. U.S. News & World Report in 2016 further ranked the Viterbi School of Engineering tied for 10th, the Rossier School of Education 15th, the Roski School of Fine Arts graduate program 36th, the USC Sol Price School of Public Policy 2nd, the University of Southern California School of Social Work 11th, and the USC School of Pharmacy tied for 9th. USCs graduate programs in physical therapy and occupational therapy are ranked the nations 1st and 3rd best programs, respectively, for 2016 by U.S. News & World Report. The USC School of Architecture was ranked 5th in 2014.  The Philosophical Gourmet Report in 2015 ranked USCs graduate philosophy program as 8th nationally.
Question: How many positions was the difference in ranking of the Keck School of Medicine for research compared to primary care?
Answer: 41