What percentage of users rated the movie "Patti Smith: Dream of Life" by more than 3?
Patti Smith: Dream of Life' is movie_title; more than 3 refers to rating_score >3; percentage = Divide(Count(rating_score where rating_score >3), Count(rating_score))*100
SELECT CAST(SUM(CASE WHEN T1.rating_score > 3 THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(T1.rating_score) FROM ratings AS T1 INNER JOIN movies AS T2 ON T1.movie_id = T2.movie_id WHERE T2.movie_title LIKE 'Patti Smith: Dream of Life'