I have been doing some research on how many people are involved and what is the processing time in the past for family visa in different locations. I came across some official documents that I would like to share. Please feel free to read them. It is a really good source of information.
Compiled Table in html format:
Past Table 1 Average processing time, in days, for Family applications, by overseas post
Submission No 46, Inquiry into Australia’s Overseas Representation
SUPPLEMENTARY SUBMISSION, by Department of Immigration(DIAC)
Other relevant sources:
Statistics on Prospective Marriage visa/procedures etc..
Submission to the Legal and Constitutional Affairs Committee Prospective Marriage Visas and Forced Marriage
Talks about how many local and 'Australian' citizens are employed in each location (in 2011)
DIAC activities within overseas posts