(2) what estimate he has made of the number of units of gas consumed in domestic dwellings in the United Kingdom in each year since 1997.
The information is as follows:
Domestic consumption (TWh) Average price per unit (pence/kWh) 1997 345.5 1.8 1998 355.9 1.8 1999 358.1 1.7 2000 369.9 1.6 2001 379.4 1.6 2002 376.4 1.7 2003 386.5 1.8 2004 396.4 1.9 2005 384.0 2.1 2006 365.9 2.6 2007 352.9 3.1 2008 363.3 3.2 2009 1194.2 4.0 1 January-June 2009
Price information is the average unit price for GB customers consuming 18,000 kWh per year paying on standard credit terms. Figures for 2009 are provisional. Consumption data for 2009 are given up to the latest available month (June).