SELECT country.country_name, 
	gross_national_product / sum( no_of_inhabitants ) AS gross_per_inhabitant, 
	area / sum( no_of_inhabitants ) area_per_inhabitant
FROM country, country_province
WHERE country.country_name = country_province.country_name
GROUP BY country.country_name

SELECT country.country_name as coutry_name, 
	area / sum( no_of_inhabitants ) area_per_inhabitant INTO coutry_crowdedness
FROM country, country_province , EUC
WHERE country.country_name = country_province.country_name
	AND country.country_name != EUC.country_name
GROUP BY country.country_name     


SELECT country_name, area_per_inhabitant
FROM country_crowdedness
WHERE area_per_inhabitant = ( SELECT max(area_per_inhabitant)
	FROM country_crowdedness )