a diverse area when it comes to socio-economics, with the two largest industries in the region being manufacturing and construction. Of the 544,000 jobs situated in the GWS, 75% of those who live in the region also work there. The Smithfield–Wetherill Park Industrial Estate is the largest industrial estate in the southern hemisphere and is the centre of manufacturing and distribution in GWS. Lying strategically between the major population growth zones in the north-west and south-west of Sydney, it contains more than 1,000 manufacturing, wholesale, transport and service firms which employ more than 20,000 persons. While overall a lower income area for Sydney, with families who are dependent on childcare as both parents work, and higher than average unemployment and lower than average salary levels, it has some exceedingly high income suburbs nonetheless. Namely, the suburb of The Ponds, in the City of Blacktown, which is the most highly advantaged suburb in NSW on the SEIFA index of advantage-disadvantage, ahead of suburbs on the North Shore, such as St Ives and Avalon. Other affluent suburbs in western Sydney, ranging from upper middle class to upper class neighbourhoods, include, Acacia Gardens, Kellyville Ridge, Bella Vista, Castle Hill, Cherrybrook, Pemulwuy, Rouse Hill, Schofields, Edmondson Park, Beaumont Hills, Glenmore Park, Cecil Hills, Elizabeth Hills, Middleton Grange, Carnes Hill, Oran Park, Jordan Springs, Ropes Crossing, Leppington and Spring Farm, among others. Lower middle class and working class neighbourhoods are mainly concentrated near the heart of the central business district areas of Fairfield, Mount Druitt, Guildford, Cabramatta, Merrylands, Rosehill, Granville, Canley Vale and Auburn. Yennora is known to be the most poorest suburb of western Sydney overall, where the median personal income is just $19,000, followed by Landsdowne, Blairmount, Wiley Park, Campsie, Roselands, Carramar, Villawood and Punchbowl. Furthmore, Claymore in the southwest was listed as one of the most socially disadvantaged areas in New South Wales. Nonetheless, the rest of the GWS region is generally made up of a middle class population, with such even found in both affluent and low income suburbs. Livability Due to Parramatta's emergence as "Sydney's second CBD", livability in the surrounding western suburbs has been advancing, with Harris Park being 63rd most liveable area by Domain Group, followed by Parramatta at 110 and Rosehill at 187. Further to the west, Penrith warranted a spot in the top 200 suburbs of the 555 on the list. Seven of the top ten