Citigroup's consumer banking business in Australia may be a little more important to the bank's business than past reviews of consumer banking trends may suggest.A one page slide summarising "credit trends" in "international consumer" in Citi's investor presentation for the bank's December 2008 quarter earnings ranks Australia as Citi's fifth largest market outside of North America.The slide suggests that Citibank has US$9.1 billion in average  receivables in Australia during the quarter. Citi defines international consumer to include cards and consumer banking. This is consistent with APRA data on Citi's household credit balances of A$15.3 billion at November 2008.Four international markets rank ahead of Australia in consumer banking at Citi: Mexico, South Korea, Britain and Japan.Trailing Australia in Citi's consumer bank rankings are India, Singapore, Malaysia, Taiwan and Hong Kong, two or three of which external analysts of consumer banking in Asia have guessed ranked ahead of Australia in importance to Citi.As reported above, two of those are now managed by Citi Holdings and are probably for sale.The presentation shows that Citi incurred net credit losses in consumer banking in Australia of US$27 million or 1.3 per cent during the December 2008 quarter, only marginally higher than the level of losses during the September quarter.