везде. изучайтеhttp://www.pewglobal.org/2017/04/24/middle-class-fortunes-in-western-europe/st_2017-04-24_western-europe-middle-class_b-01/http://www.pewresearch.org/fact-tank/2017/04/26/are-you-middle-class-in-western-europe-try-our-country-by-country-income-calculators/