in a study following individuals taking prednisone to treat various conditions over a 12-month period of time, a group of 12 individuals experiences fat redistribution. Assuming the individuals developed their fat redistribution symptoms at the following months: 2, 2, 3, 3, 4, 5, 6, 7, 7, 9, 10 and 10 respectively (assuming all individuals developed the symptoms at the end of that month).The incidence rate of fat redistribution among the individuals is ___ per 10,000 person-months? (Round to even number)