Percent of cases
The share of people who named an option: number of mentions divided by the number of valid cases. Because each person can name several options, the values add up to more than 100%.
Example: 24 of 31 people name television: 77% of cases.
Caution: Valid cases are those with at least one check (as in SPSS). People who checked nothing are not in the base unless you switch on "Include cases without a check".