Quarter Sterling (millions), Seasonally adjusted 2010-03-31 4433 2010-06-30 4394 2010-09-30 4426 2010-12-31 4505 2011-03-31 4489 2011-06-30 4569 2011-09-30 4708 2011-12-31 4793 2012-03-31 4848 2012-06-30 4915 2012-09-30 4997 2012-12-31 4938 2013-03-31 4986 2013-06-30 4992 2013-09-30 5239