Australia

55    A     VK4EMM  1,126,576    1998    Australia
55    B     VK4CRR    183,819    1991    Australia
55    C     VK4EMM  1,203,656    2002    Australia
55    D     VK4MZ     572,314    1995    Australia

58    A     none
58    B     VK6NU     110,004    2000    Australia
58    C     VK6AJ     109,311    1992    Australia
58    D     VK6ANC    321,296    1990    Australia

59    A     VK5GN     992,314    1999    Australia
59    B     VK2CZ     277,518    2001    Australia
59    C     VK1AA   1,047,654    2003    Australia
59    D     VK2VM     241,820    1998    Australia

A = Single Operator, mixed mode
B = Single Operator, phone only
C = Single Operator, cw only
D = Multi-operator
E = IARU HQ Station

Source http://www.arrl.org/contests/records/iaru.html