early 2010s, urban development has occurred in places like Camden, Campbelltown and Penrith, while Parramatta and Blacktown have grown rapidly. The GWS region overall grew at 2.1% in 2014 and 1.6% p.a. for the past decade. The South-West, such as, Leppington, spanning Liverpool, Camden and Campbelltown councils, had higher number of families. The region's population is projected to reach 3 million by 2036. The more recent suburban developments tend to be less leafy than more established Sydney neighborhoods. Home to around 1 in every 11 Australians, the 2 million inhabitants of GWS live in 743,940 dwellings with an average household size of 3.02. While Sydney CBD and the Inner West mostly consist of federation-era homes, the west usually features larger modern homes, which are predominantly found in the outer, newer suburbs, starting from the City of Fairfield and Blacktown and including Stanhope Gardens, Kellyville Ridge, and Bella Vista to the northwest, Bossley Park, Abbotsbury, and Cecil Hills to the west, and Hoxton Park, Harrington Park, and Oran Park to the southwest. High school retention rates for years 7 to 12 are the lowest in the Sydney metropolitan area, recording 69.5% compared to 95.2% in Northern Sydney. In 2009, twice as many people in GWS aged 15 or older hadn't attended school at all compared to the rest of Sydney and NSW. The region has strong automobile dependency with consequent effects on air quality, health, quality of life and household budgets. Regions The Department of Planning and Infrastructure Metropolitan Strategy for Sydney divides Greater Western Sydney into three sub-regions: Western Sydney Western Sydney as defined by the WSROC region covers and had an estimated resident population as at 30 June 2008 of 1,665,673. The region comprises the areas administered by the Blacktown City Council, Blue Mountains City Council, City of Canterbury-Bankstown, Cumberland Council, Fairfield City Council, Hawkesbury City Council, Hills Shire Council, Liverpool City Council, City of Parramatta Council, and the Penrith City Council. Western Sydney is also sometimes used to refer to the whole Greater Western Sydney region, which is the combination of Western Sydney as defined above and the Macarthur Region (also referred to as South-western Sydney). As well as the ten councils listed above, the GWS region includes Camden Council, Campbelltown City Council and Wollondilly Shire Council. Economy With more than 240,000 local businesses which generated more than $95 billion gross regional product in 2009, Western Sydney is