The Chief Secretary’s building (originally the Colonial Secretary's building) is a heritage-listed state government administrative building of the Victorian Free Classical architectural style located at 121 Macquarie Street, 65 Bridge Street, and at 44-50 Phillip Street in the Sydney central business district of New South Wales, Australia.
Goulburn Street is a street in the central business district of Sydney in New South Wales, Australia.
 Goulburn Street is in the southern portion of the Sydney central business district and runs from Darling Harbour and Chinatown in the west, to Crown Street in the east at Darlinghurst and Surry Hills.
Tank Stream, a fresh water tributary of Sydney Cove, located in New South Wales, Australia, was the fresh water supply for the fledgling colony of New South Wales in the late 18th century.
 Today it is little more than a storm water drain.
 It originated from a swamp to the west of present-day Hyde Park and at high tide entered Sydney Cove at what is now the intersection of Bridge and Pitt Streets in the Sydney central business district.
 The catchment was 65 ha , corresponding roughly the size of the Sydney central business district.
The Governor Phillip Tower, the Governor Macquarie Tower and the Museum of Sydney are the main elements of one of the largest developments in the central business district of Sydney, New South Wales, Australia.
 Completed in 1994, the property development complex occupies an elevated site in the north-east area of the central business district.
 The complex incorporates the site of the first Government House, one of Australia’s earliest and most significant sites of European heritage.
 The address is 1 Farrer Place, Sydney.
 Designed by architects Denton Corker Marshall and built by Australia's largest privately owned construction company Grocon, at the time of its completion it was regarded as achieving new standards for Sydney commercial architecture in terms of finish quality and design.
Elizabeth Street is a major street in the central business district of Sydney in New South Wales, Australia.
 The street continues south of the central business district (CBD), through the inner city suburbs of Surry Hills, Redfern and Waterloo, before terminating in Zetland.
 Elizabeth Street lies within the City of Sydney local government area.
Bathurst Street is a street in the central business district of Sydney in New South Wales, Australia.
 Bathurst Street runs for 650 m in an west-east direction with traffic flowing in this direction only.
 It is situated in the southern portion of the central business district.
 The western terminus of Bathurst Street is at Harbour Street, Darling Harbour, with the eastern terminus at Elizabeth Street, adjacent to Hyde Park.
The Pyrmont Bridge, a swing bridge across Cockle Bay, is located in Darling Harbour, part of Port Jackson, west of the central business district in Sydney, New South Wales, Australia.
 Opened in 1902, the bridge initially carried motor vehicle traffic via the Pyrmont Bridge Road between the central business district and Pyrmont .
 Since 1981 the bridge has carried pedestrian and bicycle traffic only, as motor vehicles were diverted to adjacent freeway overpasses.
The Sydney Markets are a commercial enterprise in Sydney, New South Wales, Australia.
 Sydney Markets are located in the Inner West suburb of Flemington, 16 kilometres west of the Sydney central business district, in the local government area of the Municipality of Strathfield.
 The market is the primary delivery service of these products for Sydney.
 The market has a wholesale sales section that caters to larger business and general sales to the public.
 The market is the central marketplace for Sydney's farmers to sell their products.
 It has a history dating back to 1788.
New South Wales (abbreviated as NSW) is a state on the east coast of :Australia.
 It borders Queensland to the north, Victoria to the south, and South Australia to the west.
 Its coast borders the Tasman Sea to the east.
 The Australian Capital Territory is an enclave within the state.
 New South Wales' state capital is Sydney, which is also Australia's most populous city.
 In March 2014 , the estimated population of New South Wales was 7.5 million, making it Australia's most populous state.
 Just under two-thirds of the state's population, 4.67 million, live in the Greater Sydney area.
 Inhabitants of New South Wales are referred to as "New South Welshmen".
Queens Gardens, Perth, is a 3.3 hectare park located on a former brickworks and clay pit site in the eastern end of the Perth, Western Australia Central Business District (CBD).
 The park is bounded by Hay Street to the south, Plain Street to the west, Nelson Crescent to the north and Hale Street to the east.

Question: What was the population of the Sydney, Australia central business district in 2014?
Answer: 7.5 million