In 2012, 45,266 people applied to medical schools in the United States through the American Medical College Application Service. Of these 45,266 students, 19,517 of them matriculated into a medical school for a success rate of 43 percent. However, this figure does not account for the attrition rate of pre-med students in various stages of the pre-application process (those who ultimately do not decide to apply due to weeding out by low GPA, low MCAT, lack of clinical and research experience, and numerous other factors).