road_vehicles	2000	2005	2010	2014
Passenger cars	6.83	7.06	7.56	7.36
Light commercial vehicles	6.66	7.2	8.05	8.43
Heavy duty vehicles	7.52	7.61	7.76	8.13
Two wheelers	8.92	9.47	9.19	9.05
Buses	8.7	9.36	9.46	9.39