Just looked up the Reserve Bank site and Kitco. The exchange rata tables for the Australian dollar only go back to July 1969. At that time the AUS dollar was worth $1.11 against the US dollar. US gold was $$41.09 or $37 in Aussie terms.
Therefore gold has grown by over 9% compound over the last 42 years.
Still convinced that gold does not pay interest (at least in fiat dollars)?