(1) How many road users have since 1 October 2015 purchased e-tags in each month for the Gauteng Freeway Improvement Project (GFIP); (2) how many of the e-tage purchased since 1 October 2015 (a) still constitute an active account and (b) are no longer in use; (3) how many road users in each month since 1 October 2015 have made use of the GFIP main roads on which the e-tolling system has been installed; (4) what is the monthly amount collected since 1 October 2015 by the e-tolling system?