What is the greatest number of Pakistanis admitted to Canada during those times when the number of Nepalis admitted was 627?
CREATE TABLE "immigration" (
  "year" real,
  "indians_admitted" real,
  "pakistanis_admitted" real,
  "sri_lankans_admitted" real,
  "bangladeshis_admitted" real,
  "nepalis_admitted" real
);
SELECT MAX("pakistanis_admitted") FROM "immigration" WHERE "nepalis_admitted"=627;