Based on this information the population ofsex offenders in prisons who attended sex offenders treatment programmes are: 2004-05 2005-06 Total number of Sex Offenders in prison 755 896 Total number of Sex Offenders that completed STOP programmes 60 76 Proportion (%) of Sex Offenders that completed STOP programme during the year 7.9% 8.5% Numbers of prisonersentering programmes annually are limited by factors such as sentence length andwillingness to change on the part of individual offenders.Sex offenders also need toundertake STOP programmes at the right stage in their sentence, therefore somemay have already completed a STOP programme in previous years either duringtheir current sentence or during previous sentences.