What is the ethnic group that in 2001 had 117,513?
CREATE TABLE "table1_18660332_2" (
  "ethnic_group" text,
  "2001_pct" text,
  "2001_people" text,
  "2006_pct" text,
  "2006_people" real
);
SELECT "ethnic_group" FROM "table1_18660332_2" WHERE "2001_people"='117,513';