Whether his department uses temporary employment services and/or labour brokers; if so, (a) why, (b) how many positions have been filled by temporary employment services in the (i) 2006-07, (ii) 2007-08 and (iii) 2008-09 financial years, (c) what percentage of the total staff complement did temporary employment services contribute in each of these years and (d) how much money has been spent on temporary employment services in each year?