the who's who of current & projected debt, page-8

I have use Costello's 2007 PRE-ELECTION ECONOMIC AND FISCAL OUTLOOK.
It has Australia's debt at $66.98 billion in 2007-08

http://archive.treasury.gov.au/documents/1321/PDF/PEFO_2007_Final.pdf

The same as I have used the current PEFO for the Coalitions starting point.