Head to Head Arrows driver comparison for 1981 season.
[{'label': 'Siegfried Stohr', 'data': [28, 25, 17, 21, 23, 23, 23, 23, 25, 25, 25, 22, 22, None, None]}, {'label': 'Riccardo Patrese', 'data': [17, 4, 4, 4, 4, 6, 6, 8, 8, 8, 9, 10, 11, 11, 11]}, {'label': 'Jacques Villeneuve Sr.', 'data': [None, None, None, None, None, None, None, None, None, None, None, None, None, 37, 37]}]