I problemi da risolvere per l'Italia (ed altri) sono tutti mostrati qui:
http://ec.europa.eu/eurostat/statistics-explained/index.php/File:Gross_domestic_product_(GDP)_per_inhabitant_in_purchasing_power_standards_(PPS)_in_relation_to_the_EU-28_average,_by_NUTS_2_regions,_2015_(%25_of_the_EU-28_average,_EU-28_%3D_100)_MAP_RYB17.png