Сессионная статистика.

http://www.koreanrandom.com/forum/topic/8824-8102%D0%BC%D0%BE%D0%B4-%D1%81%D0%B5%D1%81%D1%81%D0%B8%D0%BE%D0%BD%D0%BD%D0%BE%D0%B9-%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B8-exel/