DEEWR is painfully slow to release new data, but they deserve credit for at least making old data more accessible with their new online uCube facility. Constructing trend data has often meant collating data from each separate year, but uCube will now speed that for many items in the higher education student data collection.
Though it required some quick extra calculations from me, the figure below shows trends in the proportion of full-time equivalent students who are full fee. The proportion went from a bit over a quarter in 2001, to more than 40% in 2009. The trend will have reversed since: the over-enrolment frenzy for Commonwealth-supported students is pushing up their numbers, while full-fee undergraduate domestics are being phased out and international student numbers are down. If we are lucky, DEEWR will produce the exact numbers sometime late in 2012.