Argyle diamond mine at the Ekati mine, both in Canada. However, Argyle has two to four times the concentration of diamonds (ore grade) of these mines. This makes extraction economically feasible, as mine costs are mostly related to the amount of ore processed, not the amount of diamond extracted. In 2005, Rio Tinto was given the go-ahead to a future expansion project, moving it from an open pit to an underground mine. This plan was postponed; in September 2010 Rio Tinto announced fresh plans to develop an underground mine beneath the existing pit, increasing annual production to 9 million tonnes of ore. The
Women in the military by country forces with the creation of the Army Nursing Service in 1899. On the 30th of June 2017, women were found to make up 16.5% of the Australian Defence Force (with 20.6% in the Royal Australian Air Force, 20.4% in the Royal Australian Navy and 13.2% in the Australian Army). However, up until 2016, only 74% of the total number of available roles in the Australian armed forces were available to women. Despite this, using 1998-99 figures, the ADF had the highest percentage of women in its employ in the world. In 1998, Australia became the fourth nation in the world