addition, only 63% of students who attended Knox earned, on average, more than those with only a high school diploma. Student life Greek organizations Knox College is home to nine Greek-letter organizations, the oldest of which has been on campus since 1855. Providing a network of alumni to enhance job and life connections, fraternity (men's) and sorority (women's) chapters provide Knox students with living, organizational and learning opportunities. Through their respective inter-Greek governance organizations, chapters conduct a formal recruitment process during each winter term to ensure first-year students have a chance to adjust to college life and classes before joining. Most offer residential housing for members. Some chapters formerly present have closed; of these, alumni members are often still active with the college's alumni association, and recolonization of dormant chapters remains an opportunity for potential new founders. Sororities These organizations are governed by Knox's Panhellenic Council. Delta Delta Delta, 1889, NPC sorority Pi Beta Phi, 1872, NPC sorority Kappa Kappa Gamma, 2007, NPC sorority Alpha Sigma Alpha, 2010, NPC sorority Fraternities These organizations are governed by Knox's Interfraternity Council . Beta Theta Pi, 1855, NIC fraternity Lambda Chi Alpha, 1915–1934, dormant, NIC fraternity Phi Gamma Delta (FIJI), 1867, NIC fraternity Sigma Nu, 1891, NIC fraternity Tau Kappa Epsilon, 1912, NIC fraternity Phi Sigma Kappa, 1928–1955, dormant, NIC fraternity Sigma Chi, 2007, NIC fraternity Traditions Pumphandle is an annual tradition dating back to 1885 during which new members of the community are welcomed to Knox. On the afternoon before the start of the academic year, all members of the Knox community gather on the south lawn outside Old Main. The president of the college "leads the welcoming line, shaking each person's hand in turn. Everyone shakes the hands of those who have gone before, and the line grows, snaking around the campus." Flunk Day is an annual spring carnival that allows students, staff, and faculty to mingle and have fun. Classes are canceled for the day as the student body turns its attention to a joke issue of the student newspaper, live music, inflatable bounce rooms, petting zoos, a mud pit, a paint fight, and a seniors vs faculty softball game. The date of Flunk Day changes every year and is a secret until the entire student body is awakened at around 5am on the day. Flunk Day is of particular significance since Knox College does not close for reasons other