When seats for 2001 is greater than 15 and % 2001 is greater than 100, what is the % 2006?
CREATE TABLE "community_council" (
  "parties_and_voter_communities" text,
  "pct_2006" real,
  "seats_2006" real,
  "pct_2001" real,
  "seats_2001" real
);
SELECT AVG("pct_2006") FROM "community_council" WHERE "seats_2001">15 AND "pct_2001">100;