A sample of 100 cars driving on a freeway during a morning commute was drawn, and the number of occupants in each car was recorded. The results were as follows: NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Occupants 1 2 3 4 5
Number of Cars 71 16 8 3 2
a. For what proportion of cars was the number of occupants more than one standard deviation greater than the mean? (Round the final answer to two decimal places.)