What percentage of all scenes are tragic scenes in Shakespeare's work in 1594?
tragic scenes refers to GenreType = 'Tragedy'; work in 1594 refers to Date = '1594'; percentage = divide((sum(Scene) when GenreType = 'Tragedy'), count(Scene))as percentage
SELECT CAST(SUM(IIF(T2.GenreType = 'Tragedy', 1, 0)) AS REAL) * 100 / COUNT(T1.Scene) FROM chapters AS T1 INNER JOIN works AS T2 ON T1.work_id = T2.id WHERE T2.Date = '1594'