Data from the police national computer shows that in England and Wales between 1997 and 2006 43,863 offenders were convicted for the first time of dangerous driving. Of these, 3,769 were also convicted on at least one later occasion between 1997 and 2006 of dangerous driving. 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.