Statistics are not compiled in a manner which would make it possible to distinguish those crimes which are drug-related, in the widest interpretation of the term, from those which are not. It would not always be possible for invesigating gardaí to say for certain whether a particular crime was drug-related.
Information which is available shows that of the 5,857 persons committed to custody on conviction in 1992 (the latest year for which statistics are available), 154 (2.6 per cent) were sentenced in respect of the sale/supply of drugs; possession, production, cultivation, import, export of drugs or forging/altering prescriptions or having same. Where a person is committed under sentence for more than one offence, only the principal offence is recorded for statistical purposes. If, therefore, there was a drug offence but it was not the principal offence it would not be included in these figures.
I should add, of course, that offenders who commit offences not related to drugs but for the purpose of feeding a drug habit (e.g. larceny, trespass, forgery etc.) would not be included in these statistics.