Australian Electoral Commission

Informality (%) House of Representatives and Senate

Updated: 22 June 2011
Senate
Year NSW Vic. Qld WA SA Tas. ACT NT Aust.
1977 9.6 9.1 8 8.2 10.4 7.1 3.1 6.5 9
1980 9.4 11.1 9.2 9.9 8.7 7.4 2.8 7.3 9.6
1983 [note] 11.1 10.7 8.6 8.1 8.8 7.4 3.3 4.7 9.9
1984 5.2 3.7 2.7 4.2 5 5.7 3.1 2.8 4.3
1987 4.9 4 3.1 3.3 3.8 3.8 2.4 3.7 4.1
1990 4.2 3.6 2.5 2.9 2.5 3.1 2.4 2.8 3.4
1993 2.7 3.1 2 2.1 2.3 2.6 1.6 2.8 2.6
1996 3.8 3.6 3.3 3.5 3.3 3.2 2.5 2.8 3.5
1998 3.31 3.78 3.04 2.68 2.81 3.05 1.97 1.99 3.24
2001 3.5 5.6 3 3.6 3.1 3.3 2.3 2.8 3.9
2004 3.5 5.1 2.8 3.5 3.5 3.4 2.5 3.1 3.8
2007 2.24 3.28 2.34 2.42 2.38 2.63 1.7 1.94 2.55
2010 4.17 3.94 3.5 3.18 3.12 3.23 2.55 3.69 3.75
House of Representatives
Year NSW Vic. Qld WA SA Tas. ACT NT Aust.
1977 2.3 2.8 1.5 3.3 3.4 2.6 2.4 3.5 2.5
1980 2.4 2.7 1.8 2.7 2.8 2.6 2.1 4.9 2.5
1983 [note] 2.2 2.2 1.3 2 2.7 2.3 2.2 4.4 2.1
1984 5.7 7.5 4.5 7.1 8.2 5.9 4.7 4.6 6.3
1987 4.6 5.3 3.4 6.6 6.8 5 3.5 5.8 4.9
1990 3.1 3.5 2.2 3.7 3.7 3.3 3 3.4 3.2
1993 3.1 2.8 2.6 2.5 4.1 2.7 3.4 3.1 3
1996 3.6 2.9 2.6 3.2 4.1 2.4 2.8 3.4 3.2
1998 4.01 3.51 3.33 4.18 4.54 3.09 2.87 4.16 3.78
2001 5.4 4 4.8 4.9 5.5 3.4 3.5 4.6 4.8
2004 6.1 4.1 5.2 5.3 5.6 3.6 3.4 4.5 5.2
2007 4.95 3.25 3.56 3.85 3.78 2.92 2.31 3.85 3.95
2010 6.83 4.5 5.45 4.82 5.46 4.04 4.66 6.19 5.55

Note: 1983 figures include missing and discarded.