What was the (a) total amount and (b) breakdown of such amount spent by each specified department on each specified service provider on (i) aircrafts and/or (ii) helicopters in respect of the transversal hiring of such aircrafts and/or helicopters to the government (aa) in the (aaa) 2012-13, (bbb) 2013-14 and (ccc) 2014-15 financial years and (bb) since 1 April 2015?