When the 1 is the rank what is the overall amount of  international tourist arrivals in 2012?
CREATE TABLE "europe" (
  "rank" real,
  "country" text,
  "international_tourist_arrivals_2012" text,
  "international_tourist_arrivals_2011" text,
  "change_2011_to_2012" text,
  "change_2010_to_2011" text
);
SELECT COUNT("international_tourist_arrivals_2012") FROM "europe" WHERE "rank"=1;