The website doesn't mention the percent of applicants who were rewarded secondaries that get interviews. All I found was the following:
"...Upon receipt of the AMCAS application, the Committee on Admissions evaluates each applicant. Those who cannot be interviewed are notified. Other applicants receive a Supplemental Application Form before December 15. The nonrefundable processing fee of $55, which is required with submission of the Supplemental Application Packet, includes a request for an evaluation by the applicant's Premedical Advisory Committee or from individuals who have taught or supervised the applicant if the undergraduate institution does not have a Premedical Advisory Committee.
After the Supplemental Application Packet, MCAT scores, and letter(s) of evaluation are received, the completed application is reviewed by the Committee on Admissions, and candidates are invited for interview. Approximately nine percent of all applicants are asked to visit Wake Forest University School of Medicine for interviews from October through March. Academic achievement, academic improvement, MCAT scores, state (or country) of residence, and letters of recommendation are considered in selecting applicants for interview. Thus, all applicants for interview are considered competitively. By the end of April all applicants are notified of the action of the Committee on Admissions: acceptance, placement on the waiting list, or rejection. Those retained on the waiting list are considered for vacancies as accepted applicants withdraw; this list is maintained until one week after school has begun. An applicant who is accepted is asked to respond in writing within two weeks. Upon acceptance of an offer, a holding place fee must be submitted. This fee, which is credited toward tuition, is refundable until May 1..."
