Until recently, the levels were 0, 1, 2, & 3.
Now it includes
Form-level Data Viewing Rights (from 15.6): 128=No Access, 129=Read Only, 130=View records/responses and edit records (survey responses are read-only), add 8 and/or 16 (to 130) to additionally grant Edit Survey Responses and Delete rights, respectively.
Until recently, the levels were 0, 1, 2, & 3.
Now it includes