Following the 2001 federal election a survey of the Senate informal votes was conducted. A total of 470,961 ballots cast in the Senate election were determined to be informal representing 3.89% of the total Senate papers, a rise of 0.65% from the previous election.
All informal ballot papers for the Senate were categorised into the following 12 categories. The percentages shown are the percentage of each category at a National level.
|Blank Ballots.||(34.04%)||Those papers that were completely blank.|
|Writing, Slogans, Poetry||(7.42%)||Those papers that contained slogans, writing, drawings, poetry.|
|Less than 90% Below the Line.||(9.77%)||Those ballot papers that were informal Below the Line due to less than 90% of the candidates containing preferences.|
|First preference only Below the Line.||(26.21%)||Ballot papers containing only the number '1' Below The Line.|
|More than one number 1 Below the Line.||(4.95%)||Those ballot papers that contained more then one first preference Below the Line.|
|Large Number of repeating numbers or missing numbers Below the Line.||(2.87%)||Section 270 of the Commonwealth Electoral Act 1918 allows for votes to be admitted as formal with a small number of non-consecutive numbers. These ballot ballots are informal as a result of containing more than the allowed number of non-consecutive numbering.|
|Use of letters Above the Line.||(0.68%)||Ballot papers that use lettering above the line.|
|Combination of Ticks and Crosses above the Line.||(2.63%)||Ballot papers that use Ticks AND Crosses Above The Line.|
|No First Preference below the Line||(0.40%)||Ballot papers that contain no first preference Below The Line.|
|Ticks and Crosses below the Line||(3.19%)||Ballot Papers that use Ticks AND Crosses Below The Line|
|Other||(3.59%)||Those ballot papers that are informal but can not be categorised into any one of the above.|
New South Wales
Australian Capital Territory