number of terms. Regular elections for all offices are held at the same time in the odd year preceding the presidential election year. The following is a list of all mayors of West Lafayette since the position began in 1924. Education West Lafayette is the home of Purdue University's main campus, with an enrollment of over 40,000 students. The West Lafayette Community School Corporation administers three schools. The school district is not coterminous with the municipality; areas annexed by the city after 2000 continue to be served by county schools. Students attend West Lafayette Elementary School (formerly Cumberland Elementary School) through third grade, while students in grades 4–6 attend West Lafayette Intermediate School. Students in the 7th grade and above attend West Lafayette Junior-Senior High School. The West Lafayette Community School Corporation is a top rated, public school district with numerous accolades. The Seventh-day Adventist Church operates Pleasantview SDA School which offers courses for grades K–8, and the Montessori School of Greater Lafayette teaches K–6. There are other schools, both public and private, that have a West Lafayette address, but these are actually located outside the city limits. Approximately 77% of West Lafayette's population age 25 or older hold a bachelor's degree or higher according to the U.S. Census 2005–2007 American Community Survey. The city ranks sixth highest on this measure among U.S. municipalities between 20,000 and 65,000 population. In addition, the Tippecanoe School Corporation and Lafayette School Corporation operate public schools outside the West Lafayette city limits. There is also a variety of private schools in Lafayette and an Ivy Tech Community College branch. The town has a lending library, the West Lafayette Public Library. There is also a branch of the county-run library (Tippecanoe County Public Library) in the Klondike area to the west of the city. Economy The economy of West Lafayette is heavily influenced by the presence of Purdue University, with an enrollment of over 50,000, more than the city's population. The university employs 12,000 people, most of whom live in either West Lafayette or Lafayette. The Purdue Research Park, established in 1961, is home to more than 140 companies of which nearly 100 are technology related. As of 2009, these companies employ more than 3,000. The Park offers communications infrastructure, research facilities, a business incubation complex to help start-up firms and scenic walking trails and lakes. It is one of the largest university-affiliated research parks