This information is available in the published Court Outcomes by Police Force Area data tool: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/733996/court-outcomes-by-pfa-2017-update.xlsx. To limit the data to Wales, drag ‘Police Force Area’ field into the ‘Filters’ area and select Dyfed-Powys, Gwent, North Wales and South Wales. To see the number of prosecutions for indictable offences, drag the ‘Offence Type’ field into rows and sum the amounts for ’01: Indictable only’ and ’02: Triable Either Way’. Please note that all cases are first heard at Magistrates Court and more serious cases are sent for trial or sentencing at Crown Court, therefore some cases may be counted twice within a given year – once at Magistrates and then again at Crown Court.