<P> Polymer note technology was developed by Australia, and Australia prints polymer banknotes for a number of other countries . In 1988, Australia introduced its first polymer bank note and in 1996, Australia became the first country in the world to have a complete series of polymer notes . Australia's notes are printed by Note Printing Australia, a wholly owned subsidiary of the Reserve Bank of Australia . Note Printing Australia prints polymer notes or simply supplies the polymer substrate for a growing number of other countries including Bangladesh, Brunei, Chile, Indonesia, Kuwait, Malaysia, Mexico, Nepal, New Zealand, Papua New Guinea, Romania, Samoa, Singapore, Solomon Islands, Sri Lanka, Thailand and Vietnam . Many other countries are showing a strong interest in the new technology . </P> <P> All Australian coins depict Queen Elizabeth II on the obverse, with different images on the reverse of each coin . </P> <Ul> <Li> The $2 coin, which replaced the paper two dollar note in 1988, depicts an Aboriginal tribal elder set against a background of the Southern Cross and native grasstrees . (Designed by Horst Hahne) </Li> <Li> The $1 coin, which replaced the paper $1 note in 1984, depicts five kangaroos . (Designed by Stuart Devlin) </Li> <Li> The 50 cent coin carries the coat of arms of Australia: the six state badges on a central shield supported by a kangaroo and an emu, with a background of golden wattle, Australia's floral emblem (Designed by Stuart Devlin) </Li> <Li> The 20 cent coin carries a platypus, one of only two egg - laying mammals in the world . It has webbed feet and a duck - like bill that it uses to hunt for food along the bottom of streams and rivers . (Designed by Stuart Devlin) </Li> <Li> The 10 cent coin features a male lyrebird dancing . A clever mimic, the lyrebird inhabits the dense, damp forests of Australia's eastern coast . (Designed by Stuart Devlin) </Li> <Li> The 5 cent coin depicts an echidna, or spiny anteater, the world's only other egg - laying mammal . (Designed by Stuart Devlin) </Li> <Li> The 2 cent coin (withdrawn from circulation since 1992) depicted a frilled lizard . (Designed by Stuart Devlin) </Li> <Li> The 1 cent coin (withdrawn from circulation since 1992) depicted a feather tailed glider (Designed by Stuart Devlin) </Li> </Ul> <Li> The $2 coin, which replaced the paper two dollar note in 1988, depicts an Aboriginal tribal elder set against a background of the Southern Cross and native grasstrees . (Designed by Horst Hahne) </Li>

When did australia change to dollars and cents