Head to Head Sauber driver comparison for 2011 season.
[{'label': 'Kamui Kobayashi', 'data': [9, 10, 10, 11, 10, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12]}, {'label': 'Sergio Pérez', 'data': [20, 21, 18, 14, 15, None, 16, 14, 14, 15, 15, 16, 16, 15, 16, 16, 16, 16]}, {'label': 'Pedro de la Rosa', 'data': [None, None, None, None, None, 18, None, None, None, None, None, None, None, None, None, None, None, None]}]