What is the 2009 average when the 2007 average is more than 0,18?
CREATE TABLE "world_energy_intensity_progression_by_ye" (
  "country" text,
  "unit_p_koe_05" text,
  "2006" real,
  "2007" real,
  "2008" real,
  "2009" real
);
SELECT AVG("2009") FROM "world_energy_intensity_progression_by_ye" WHERE "2007">'0,18';