Question - National Arboretum Canberra

(1)          How long has the National Arboretum Canberra enforced paid parking.

(2)          How much revenue has been raised, per year, since the enforcement of paid parking.

(3)          Of the revenue referred to in part (2), how much has gone directly into the maintenance and functioning of the Arboretum.

(4)          If there is any remaining revenue, where have these funds been allocated to.