With reference to the reply to question 3517 on 24 November 2017, what number of foreign nationals (a) entered the country on (i) visitor visas and/or (ii) holiday visas in (aa) 2013, (bb) 2014 and (cc) 2015, (b) departed on or before the date on which their visas expired in the specified years and (c) of each nationality did not depart in the specified years;
(2) What is the estimated total number of foreign nationalists who have not left the country once their visitor and/or holiday visas expired since 1994?