The Manufacturing industry has historically been the largest industry in Australia. However, the percentage contribution of Manufacturing to GDP has been decreasing over the past three decades. In the early 1970s Manufacturing value added contributed almost 25% to GDP, while in 2005-06 the Manufacturing industry contributed 11% to GDP, with the Property & business service industry being the largest, contributing 12.4% to GDP. However, the Manufacturing industry remains the largest industry in the market sector. Although the Manufacturing industry contributes less to GDP today than it did twenty years ago, output in the industry has had an upward trend over the same time period.