Update on Macquarie
The QS topuniversities site does not provide information about ranking components for universities outside the top 200. It does , however, provide links to pages with the raw data and their sources, for which they are to be highly commended.
It seems that this year Macquarie is recorded as having 1,018 full time equivalent faculty (865 headcount) and 255 full time equivalent international faculty (267 headcount). So, 25 % of Macquarie's faculty are international.
The information on total faculty was submitted by Baerbel Eckelmann on 8/10/07 and on international faculty by "Director" on 15/6/07.
The figure for 2006 was presumably much higher and incorrect. It would be interesting if Macquarie or QS could indicate how it was derived.
It would seem that one reason for the apparent decline of Macquarie was simply the correction of a previous error.