Head to Head BRM driver comparison for 1971 season.
[{'label': 'Jo Siffert', 'data': [20, 24, 22, 14, 11, 11, 12, 5, 6, 6, 5]}, {'label': 'Pedro Rodríguez', 'data': [18, 7, 8, 4, 4, None, None, None, None, None, None]}, {'label': 'Howden Ganley', 'data': [17, 15, 20, 15, 16, 17, 18, 19, 19, 20, 15]}, {'label': 'Vic Elford', 'data': [None, None, None, None, None, None, 24, None, None, None, None]}, {'label': 'Peter Gethin', 'data': [None, None, None, None, None, None, None, 21, 9, 9, 9]}, {'label': 'Helmut Marko', 'data': [None, None, None, None, None, None, None, 26, 27, 28, 29]}, {'label': 'George Eaton', 'data': [None, None, None, None, None, None, None, None, None, 32, None]}, {'label': 'John Cannon', 'data': [None, None, None, None, None, None, None, None, None, None, 33]}]
