Although annual figures for each year since 1997 are not available, the Statistical Bulletins on juvenile re-offending published by the Ministry of Justice show quarterly figures for the number of offenders aged 10-17, who at the time of receiving a reprimand, final warning or conviction had no previous offences.
Figures are available for cohorts of offenders from the first quarters of 2000, 2004 and 2005. The cohorts are constructed in order to measure re-offending and therefore exclude juveniles receiving custodial sentences but include juveniles discharged from custody during each quarter.
The numbers of juveniles with no previous offences in each of the quarterly cohorts were as follows:
Number 2000 21,546 2004 23,379 2005 24,739
These figures have been derived from the police’s administrative IT system, which, as with any large scale recording system, is subject to possible errors with data entry and processing.