Oxford Driving $/$uailsny has five instructors avallable to provide training sessions to voung drivers. Assume that the design capacity of the academy is $1900$ students per year and that effective capacity equals $90\%$ of design capacity. If the number of young drivers who actually got their driving lessons is $1500,$ what is the efficiency of the academy?

Please just enter the percentage number ONLY $[$for example, $15\%].$ Entering anything other than a percentage number in the answer box will result in zero grade for this qnestion. Round up your answer to the next whole number.