/** @return xml-element containing current lookup data */
 public Element exportToXML() {
   DefaultElement country = new DefaultElement("CountryLookup");
   Set<String> codeKeys = countryLookup.keySet();
   for (String code : codeKeys) {
     DefaultElement countryXml = new DefaultElement("CountryKey");
     countryXml.addAttribute("code", code);
     countryXml.addAttribute("countryGeoIP", getGeoIpCountryName(code));
     countryXml.addAttribute("countryPingEr", getPingErCountryName(code));
     countryXml.addAttribute("regionPingEr", getPingErRegionName(code));
     country.add(countryXml);
   }
   return country;
 }