A flexible pavement is known to have a structural number of 4. The pavement is on a soil with a resilient modulus of 5000 lb/in2. The pavement was designed with 90% reliability, an overall standard deviation of 0.4, and a ΔPSI of 2.0 (a TSI of 2.5). How many 18-kip single-axle loads can be carried per day before the pavement reaches its TSI, if the design life is 20 years?