Name Friday, 16 of May Thursday, 15 of May average on Friday average for 7 days 1 day 133 ? 143 133 2 days 6 ? 6.2 6 3-4 days 5 ? 3.8 5 5-7 days 2 ? 2.2 2 amount of selected 146 ? 156 146 total 146 ? 156 146