Name the gdp where gdp per capita 20200
CREATE TABLE "2004_enlargement" (
  "member_countries" text,
  "population" real,
  "area_km" real,
  "gdp_billion_us" text,
  "gdp_per_capita_us" real
);
SELECT "gdp_billion_us" FROM "2004_enlargement" WHERE "gdp_per_capita_us"=20200;