protected function getListData()
 {
     $data = array();
     $today = date("Y-m-d");
     $yesterday = date("Y-m-d", strtotime("yesterday"));
     $all = $this->page_id ? ilWikiStat::getFigureOptionsPage() : ilWikiStat::getFigureOptions();
     foreach ($all as $figure => $title) {
         if ($this->page_id) {
             $tmp = (array) ilWikiStat::getFigureDataPage($this->wiki_id, $this->page_id, $figure, $yesterday, $today);
         } else {
             $tmp = (array) ilWikiStat::getFigureData($this->wiki_id, $figure, $yesterday, $today);
         }
         $data[$title] = array("yesterday" => (double) $tmp[$yesterday], "today" => (double) $tmp[$today]);
     }
     return $data;
 }