Name during 14-20 October during 7-13 October average for 4 weeks 1 session 597 ? 597 2 sessions 60 ? 60 from 3 to 5 sessions 22 ? 22 from 6 to 10 sessions 4.9 ? 4.9 more than 10 sessions 1.9 ? 1.9 amount of selected 687 ? 687 total 687 ? 687