which drivers drove in the 1975 swiss grand prix?
clay regazzoni, patrick depailler, jochen mass, ronnie peterson, john watson, carlos pace, tom pryce, james hunt, chris amon, jacques laffite, vittorio brambilla, rolf stommelen, tony trimmer, jo vonlanthen, jean-pierre jarier, emerson fittipaldi
how many laps did jean-pierre jarier drive?
33