That is ok, stats by themselves won't explain the numbers. It seems as though Butte College rewards persistence in nursing enrollment. Since they use a lottery system, it would seem logical that they give multiple applicants extra entries in the lottery. Therefore, the more times you apply, the more entries you get, increasing your chance of success. Since many applicants apply to multiple schools, the number of re-applying students drops due to acceptance in other schools. This reduces the number of 5,6 and 7 time applicants thus increasing the probability of success for those that persist.