What was the percentage in 2006 when in 2001 was 66.9 %?
CREATE TABLE "table1_18660332_2" (
  "ethnic_group" text,
  "2001_pct" text,
  "2001_people" text,
  "2006_pct" text,
  "2006_people" real
);
SELECT "2006_pct" FROM "table1_18660332_2" WHERE "2001_pct"='66.9';