Almost half of prisoners released from jails carry out another criminal offence within three years, latest official figures reveal.
The 45% reoffending rate for inmates let out in 2010 was down slightly on the previous year.
Men are more likely to break the law again than women, with nearly half of all males reoffending within three years compared with four in 10 females.
Younger prisoners were much more likely to reoffend than older inmates after they were let out.
The figures, based on crime incident and court conviction records up to the end of 2015, were released by the Central Statistics Office.
They show that those put behind bars for burglary and similar offences had the highest rate of re-offending. Almost seven in 10 went on to be convicted of another crime after being released.
Similarly, almost four in 10 offenders who were handed probation or community service orders in 2010 went on to commit another offence within three years.
This number was up very slightly on the previous year.
Again, men and younger offenders were more likely to commit another offence than women or older people.