With regard to the total number of students receiving funding from the National Student Financial Aid Scheme (NSFAS) in the 2016 academic year, what is the reason for the discrepancy between the figure of total number of students stated in his reply to question 606 on 24 April 2017 as 470 352, and the figure of 405 000 quoted by a certain person (name and details furnished) during a presentation to the Portfolio Committee on Higher Education on 3 May 2017?