public function getSendStatistics() {
        $response = $this->_makeRequest(array(
            'Action' => 'GetSendStatistics'
        ));
        $dom = new DOMDocument();
        $dom->loadXML($response);
        $members = $dom->getElementsByTagName('member');
        $out = array();
        foreach ($members as $member) {
            $out[] = array(
                'DeliveryAttempts'  => $member->getElementsByTagName('DeliveryAttempts')->item(0)->nodeValue,
                'Timestamp'         => $member->getElementsByTagName('Timestamp')->item(0)->nodeValue,
                'Rejects'           => $member->getElementsByTagName('Rejects')->item(0)->nodeValue,
                'Bounces'           => $member->getElementsByTagName('Bounces')->item(0)->nodeValue,
                'Complaints'        => $member->getElementsByTagName('Complaints')->item(0)->nodeValue,
            );
        }
        return $out;
    }