by Rupert Murdoch. Australia's largest oil company, Santos, prominent South Australian brewery, Coopers, major national retailer Harris Scarfe and Australia's second largest listed investment company Argo Investments Limited call Adelaide their home.
Defence industry
Adelaide is home to a large proportion of Australia's defence industries, which contribute over A$1 billion to South Australia's Gross State Product. Seventy-two percent of Australian defence companies are in Adelaide. The principal government military research institution, the Defence Science and Technology Organisation, and other defence technology organisations such as BAE Systems Australia and Lockheed Martin Australia, are north of Salisbury and west of Elizabeth in an area now called "Edinburgh Parks", adjacent to RAAF Base Edinburgh.
Others, such as Saab Systems and Raytheon, are in or near Technology Park. The Australian Submarine Corporation, based in the industrial suburb of Osborne, was charged with constructing Australia's Collins class submarines and more recently the A$6 billion contract to construct the Royal Australian Navy's new air-warfare destroyers.
Employment statistics
There are 466,829 employed people in Adelaide, with 62.3% full-time and 35.1% part-time. In recent years there has been a growing trend towards part-time (which includes casual) employment, increasing from 11.6% of the workplace in 1991, to over a third today.
The median weekly individual income for people aged 15 years and over is $447 per week, compared with $466 nationally. The median family income is $1,137 per week, compared with $1,171 nationally. Adelaide's housing and living costs are substantially lower than that of other Australian cities, with housing being notably cheaper. The median Adelaide house price is half that of Sydney and two-thirds that of Melbourne. The three-month trend unemployment rate to March 2007 was 6.2%. The Northern suburbs'
