What is the GDP per capita (US$) of the country that has a Population of 2,011,473?
CREATE TABLE "2004_enlargement" (
  "member_countries" text,
  "population" text,
  "area_km" text,
  "gdp_billion_us" text,
  "gdp_per_capita_us" text
);
SELECT "gdp_per_capita_us" FROM "2004_enlargement" WHERE "population"='2,011,473';