How many foreign nationals have been declared undesirable persons by his department since the Immigration Regulations came into effect on 26 May 2014, on the grounds of (a) likely to become a public charge, (b) being identified by him, after consultation with the Immigration Advisory Board, as undesirable, (c) found to be an unrehabilitated insolvent, (d) found to be a fugitive from justice, (e) being ordered to depart the country in terms of the Immigration Act, (f) having a criminal conviction without the option of a fine for conduct which would be an offence in the country and (g) overstaying their visa dates?