The requested information for all prison establishments in England and Wales as at 30 June each year can be found in the following table:
Total Less than or equal to 3 months Greater than 3 and less than or equal to 6 months Greater than 6 months and less than 12 months Greater than or equal to 12 months 2004 60,924 1,794 3,939 2,306 52,886 2005 62,179 1,866 4,127 2,225 53,961 2006 63,404 1,802 4,136 2,525 54,942 2007 65,533 1,547 3,597 2,462 57,928 2008 68,124 1,829 4,027 2,866 59,403
These figures are a reworking of figures which are available at the website:
http://www.justice.gov.uk/publications/populationincustody.htm
These figures have been drawn from administrative IT systems, which, as with any large scale recording system, are subject to possible errors with data entry and processing.