What is listed the Favorite Professional Sport that's got a 2005 of 17.1%?
CREATE TABLE "professional_organizations" (
  "favorite_professional_sport" text,
  "2005" text,
  "2008" text,
  "2011" text,
  "2012" text
);
SELECT "favorite_professional_sport" FROM "professional_organizations" WHERE "2005"='17.1%';