(a) How many trips has the VIP Protection Service undertaken to transport President J G Zuma to and from his private residence in Nkandla in the (i) 2009-10, (ii) 2010-11, (iii) 2011-12, (iv) 2012-13, (v) 2013-14 and (vi) 2014-2015 financial years and (b) what were the costs of the trips in each specified year?