public function getExpiryYear()
    {
        $expiryDate = $this->getDataItem('ExpiryDate');

        if (! empty($expiryDate)) {
            // COnvert 2-digit year to 4-dogot year, in 1970-2069 range.
            $dateTime = \DateTime::createFromFormat('y', substr($expiryDate, 2, 2));
            return (int)$dateTime->format('Y');
        }
    }