Australian Commonwealth House of Reps results – 2013
The link above is to a file that shows the electorate margins for all seats in the Federal House of Representatives from the 2013 election. It was saved from the Australian Electoral Commission website. The only manipulation I have done is to sort the chart so that the margins appear from smallest to largest.
This file is saved in .csv format. Feel free to download a copy and sort in any way you wish to answer your own questions.