the property offenses. In 2013, San Diego had the lowest murder rate of the ten largest cities in the United States. Education Primary and secondary schools Public schools in San Diego are operated by independent school districts. The majority of the public schools in the city are served by the San Diego Unified School District, the second-largest school district in California, which includes 11 K–8 schools, 107 elementary schools, 24 middle schools, 13 atypical and alternative schools, 28 high schools, and 45 charter schools. Several adjacent school districts which are headquartered outside the city limits serve some schools within the city; these include the Poway Unified School District, Del Mar Union School District, San Dieguito Union High School District, and Sweetwater Union High School District. In addition, there are a number of private schools in the city. Colleges and universities According to education rankings released by the U.S. Census Bureau in 2017, 44.4% of San Diegans (city, not county) ages 25 and older hold bachelor's degrees, compared to 30.9% in the United States as a whole. The census ranks the city as the ninth-most educated city in the United States, based on these figures. The largest university in the area is the University of California, San Diego (UC San Diego). The university is the southernmost campus of the University of California system and is the second largest employer in the city. It is the only university in the city that is classified "R1: Doctoral Universities – Very high research activity", and it has the 7th largest research expenditure in the country. Other public colleges and universities in the city include San Diego State University (SDSU) and the San Diego Community College District, which includes San Diego City College, San Diego Mesa College, and San Diego Miramar College. Private non-profit colleges and universities in the city include the University of San Diego (USD), Point Loma Nazarene University (PLNU), National University's San Diego campus, University of Redlands' School of Business San Diego campus, Brandman University's San Diego campus, San Diego Christian College, and John Paul the Great Catholic University. For-profit institutions include Alliant International University (AIU), California International Business University (CIBU), California College San Diego, Fashion Institute of Design & Merchandising's San Diego campus, NewSchool of Architecture and Design, Platt College, Southern States University (SSU), UEI College, and Woodbury University School of Architecture's satellite campus. There is one medical school in the