The number of hours per week that the television is turned on is determined for each family in a sample. The mean of the data is 35 hours and the median is 31.2 hours. Twenty-four of the families in the sample turned on the television for 20 hours or less for the week. The 12^th percentile of the data is 20 hours.

Approximately how many families are in the sample? Round your answer to the nearest integer.