Over the past 15 years, the number of hurricanes per year to cause damage in a certain city is 4, 2, 1, 3, 0, 2, 1, 3, 5, 2, 3, 1, 1, 2, and 0. What is the probability that the time between consecutive hurricanes exceeds 1 year? What is the return period of hurricanes for this city?