public function getTokenCountUnanswered()
    {
        $tokenSelect = $this->tracker->getTokenSelect(new \Zend_Db_Expr('COUNT(*)'));
        $tokenSelect
                ->andReceptionCodes(array())
                ->andSurveys(array())
                ->andRounds(array())
                ->forRespondent($this->getRespondentId())
                ->forGroupId($this->getSurvey()->getGroupId())
                ->onlySucces()
                ->onlyValid()
                ->forWhere('gsu_active = 1')
                ->forWhere('gro_active = 1 OR gro_active IS NULL')
                ->withoutToken($this->_tokenId);

        $this->_addRelation($tokenSelect);

        return $tokenSelect->fetchOne();
    }