Checks whether there is downloaded information, and if not, or if refresh=TRUE is specified, calls getDataTable to retrieve VEH0122 car ownership stats, then saves these in VEH0122.csv locally.
1  | 
refresh | 
 Download the latest .ods file even if we have a local copy. Default is FALSE (i.e. look for a local version of VEH0122.ods first).  | 
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