For information on 2006-07 I refer the hon. Member to the answer given to him by the former Financial Secretary to the Treasury, my hon. Friend the Member for Wentworth (John Healey), on 7 November 2006, Official Report, column 1022W. For information on 2005-06 I refer the hon. Member to the answer given to the hon. Member for Runnymede and Weybridge (Mr. Hammond) on 2 May 2007, Official Report, column 1743W. Information on earlier years could be provided only at disproportionate cost.