I refer the hon. Member to the answers I gave to the hon. Member for Hertford and Stortford (Mr. Prisk) on 13 November 2008, Official Report, column 1322W and the right hon. and learned Member for Devizes (Mr. Ancram) on 27 October 2008, Official Report, column 717W.
Figures for earlier years could be supplied only at disproportionate cost.