Australia has often made special 50-cent coins. The first was in 1970, to honor Captain Cook's finding the east coast of Australia. In 1977 a coin was made for Queen Elizabeth II's Silver Jubilee. In 1981 a coin was made for the wedding of Charles and Diana. The Brisbane Commonwealth Games had a special coin in 1982. Another one was made for the Australian Bicentenary in 1988. There have been many more special coins made since the 1990s. They are popular with people who collect coins. Australia has also made special 20-cent and one-dollar coins.