To avoid being suspended from the college, students must make "normal progress towards graduation." This generally means that the student must pass at least 12 credits of classes in each individual semester, with grades C or higher, and have accumulated enough credits to make graduation possible at the end of four years, which requires an average of 15.5 credits each semester. A student who is not making normal progress towards graduation is placed on academic probation and may be dismissed from the college. Nationwide, only 20% of college students complete a four-year undergraduate degree within four years, and only 57% of college students graduate within six years. However, at Grinnell College, 84% of students graduate within four years. This is the highest graduation rate of any college in Iowa. Grinnell's combined tuition, room, board, and fees for the 2019–2020 academic year is $67,646. Tuition and fees are $54,354 and room and board are $13,292. Grinnell College is one of a few dozen US colleges that maintain need-blind admissions and meets the full demonstrated financial need of all U.S. residents who are admitted to the college. Grinnell offers a large amount of need-based and merit-based aid in comparison with peer institutions. About 90% of students receive some form of financial aid. In 2013–2014, 24% of students enrolled at Grinnell College were receiving federal Pell Grants, which are generally reserved for students from low-income families. The average financial aid package is over $26,000. With the first-year students enrolled in the 2006–2007 school year, Grinnell has ended its need-blind admissions policy for international applicants. Under the old policy, students from countries outside the U.S. were admitted without any consideration of their ability to afford four years of study at the college. However, financial aid offers to these students were limited to half the cost of tuition. International students frequently carried very high workloads in an effort to pay the bills, and their academic performance often suffered. Under the new "need-sensitive" or "need-aware" policy, international students whose demonstrated financial needs can be met are given a slight admissions edge over applicants who can't. The twin hopes are that the enrolled international students will be able to dedicate more energy to their schoolwork, and also that this will ultimately allow the college to provide higher tuition grants to international students. Additionally, several extremely competitive "special scholarships" were set up to meet the full demonstrated financial needs for students from the following countries or regions: Africa, Eastern and Central Europe, Latin America, Middle East and Asia, Nepal, the People's Republic of China, as well as for native speakers of Russian regardless of citizenship, available every other year.