public function getMaximumAmount()
    {
        if (!isset($this->_issuerData))
            throw new Exception("Issuer must be selected first");
        if (!isset($this->_country))
            throw new Exception("Country must be selected first");
        foreach ($this->_issuerData["Countries"] as $country) {
            if ($this->_country == $country["CountryCode"]) {
                return intval($country["MaximumAmount"]);
            }
        }
    }