Officers, prisoners and prisoner to officer ratio31 MarchOfficers1, 4Prisoners2Prisoners per officer3199723,05856,6712.4199823,44463,3732.5199924,11365,3462.5200024,34665,1532.5200124,02364,6802.5 200223,32467,6332.7200323,84271,4982.7200425,66473,6582.8200526,48074,8082.8200626,93576,5642.8200727,34678,8802.9200828,06280,6762.9 1 Includes prison officers, senior officers and principal officers within the public sector Prison Service and custody officers and senior custody officers within contracted establishments, where available. 2 Average prisoner population across the year has been used, 2007-08 figure is provisional. 3 Prisoners held at contracted establishments where officer numbers are not available have been excluded from the calculation. 4 Data for Lowdham Grange prior to March 2005 and Rye Hill prior to 2006 are not available due to archiving and could be provided only at a disproportionate cost. Data prior to 2004 are available only for one establishment, Parc, and information prior to 1999 is not available and could be provided only at a disproportionate cost.