In 2009, Internationale Outstanding University (IOU) had an enrollment of 25,822 undergraduates, each of whom paid $6,374 per year in tuition. In 2010, enrollment was 27,843 students, and tuition was raised 5.7\%. In 2011, IOU received $186.8M in revenue from student tuition, and enrollment was 26,462 students. In 2012 , it is estimated that tuition will be $7,057 and 10U needs to receive 4.9% more total revenue from tuition than in 2011. Assuming the 2012 revenue and student enrollment goals are met, what will be the average annual growth rate of tuition for 2009 to 2012