Head to Head Ensign driver comparison for 1980 season.
[{'label': 'Clay Regazzoni', 'data': [10, 20, 18, 20, None, None, None, None, None, None, None, None, None, None]}, {'label': 'Tiff Needell', 'data': [None, None, None, None, 28, 28, None, None, None, None, None, None, None, None]}, {'label': 'Jan Lammers', 'data': [None, None, None, None, None, None, 24, 26, 26, 26, 26, 26, 26, 26]}, {'label': 'Geoff Lees', 'data': [None, None, None, None, None, None, None, None, None, None, 27, 28, None, None]}]