query: #defaultView:BubbleChart
  SELECT distinct ?country ?countryLabel  (count(?site) as ?sites)
  
  WHERE { 
    
    ?site wdt:P1435 wd:Q9259 . 
    ?site wdt:P17 ?country .
    SERVICE wikibase:label {
  		bd:serviceParam wikibase:language "en" .
  	}
  }
  
  GROUP BY ?country ?countryLabel
  ORDER BY DESC(?sites)
  