With reference to her reply to question 3609 on 25 October 2022, wherein she indicated that during the 2013 to 2021 period, a total number of 33 113 bursary recipients who were eligible for placement graduated, whom were placed after graduation and a total number of 135 309 received bursaries during the specified time, of which only 33 113 graduated were placed, what (a) total number of the original 135 509 (i) changed streams and/or (ii) dropped out and (b) is the reason for the discrepancy of students that registered versus the 33 113 who graduated and/or were placed?