Database: simpson_episodes
Question: In year 2009, what is the percentage of the episode titled by "Gone Maggie Gone" being nominated?
SQL: SELECT CAST((SUM(CASE WHEN T1.result = 'Nominee' THEN 1 ELSE 0 END) - SUM(CASE WHEN T1.result = 'Winner' THEN 1 ELSE 0 END)) AS REAL) * 100 / COUNT(T1.result) FROM Award AS T1 INNER JOIN Episode AS T2 ON T1.episode_id = T2.episode_id WHERE T2.title = 'Gone Maggie Gone' AND T1.year = 2009;