The available information is in the following table.
Quarter ending Number February 1997 4,000 February 1998 4,000 February 1999 3,500 February 2000 3,200 February 2001 3,280 February 2002 3,240 February 2003 3,290 February 2004 3,330 February 2005 3,400 February 2006 3,430 February 2007 3,320 Notes: 1. February 1997 to February 1999 (inclusive) numbers are uprated to WPLS totals and rounded to the nearest hundred. 2. February 2000 to February 2007 (inclusive) numbers are rounded to the nearest ten. 3. February 1997 to February 1999 (inclusive) numbers are based on a five per cent. sample, and are therefore subject to a degree of sampling variation. 4. These figures should be used as a guide to the current situation only. Source: DWP Information Directorate five per cent sample and 100 per cent Work and Pensions Longitudinal Study