Head to Head BMW Sauber driver comparison for 2009 season.
[{'label': 'Robert Kubica', 'data': [14, 19, 19, 20, 18, 19, 15, 15, 15, 15, 14, 15, 15, 14, 14, 13, 14]}, {'label': 'Nick Heidfeld', 'data': [10, 5, 7, 9, 9, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 14, 13]}]