what is the total number of seats 2001 with seats 2006 more than 10 and voter communities of cdu?
CREATE TABLE "community_council" (
  "parties_and_voter_communities" text,
  "pct_2006" real,
  "seats_2006" real,
  "pct_2001" real,
  "seats_2001" real
);
SELECT SUM("seats_2001") FROM "community_council" WHERE "parties_and_voter_communities"='cdu' AND "seats_2006">10;