Why are there 3 dates of issue 1992 1995 2001 for the Australian Five Dollar note?

The Royal Australian Mint does not produce banknotes in every year. They only print banknotes to keep a sufficient number in circulation.

Australian paper Five Dollar banknotes have been printed in - 1967, 1969, 1972, 1974, 1976, 1979, 1983, 1985, 1990 and 1991.

Australian polymer Five Dollar banknotes have been printed in - 1992, 1993, 1995, 1996, 1997, 1998, 2001 (Federation commemorative), 2002, 2003, 2005 and 2007.