How many Sri Lankans were admitted in 2004 when more than 594 Nepalis were admitted?
CREATE TABLE "immigration" (
  "year" text,
  "indians_admitted" real,
  "pakistanis_admitted" real,
  "sri_lankans_admitted" real,
  "bangladeshis_admitted" real,
  "nepalis_admitted" real
);
SELECT SUM("sri_lankans_admitted") FROM "immigration" WHERE "year"='2004' AND "nepalis_admitted">594;