Pune's vehicle population has increased by 67% between 2003 and 2009, but supply of fuel (petrol and diesel) has decreased by 16% in the same period, as per the Pune Municipal Corporation's Environmental Status Report. Year No. of vehicles (lakhs) Supply of fuel (core litres)2003 10.57 (2W 8.64, cars 1.0) 52.42004 11.52 52.892005 12.24 35.722006 13.53 93.272007 15.10 32.952008 16.23 78.652009 17.62 (2W 13.12, cars 2.17) 44.32 Several conclusions can be drawn: data is suspect, vehicles are more fuel efficient, less use of vehicle, registered in pune but used elsewhere, octroi evasion, etc. My view is, we must use historical data with time/date element with suspicion and always specify both the original dates and derived modern christian dates. Our calendar system is relative. Sampath