Question: What was the estimated population in 2017 of the city where the 2016 Rally Australia was held?

full_context: Document 1: Gold Coast, Queensland: The Gold Coast is a coastal area in the Australian state of Queensland, approximately 66 km south-southeast of the state capital Brisbane and immediately north of the border with New South Wales. With a census-estimated 2016 population of 638,090, The Gold Coast is the sixth-largest city in Australia, making it the largest non-capital city, and the second-largest city in Queensland.
Document 2: Coffs Harbour International Stadium: The Coffs Harbour International Stadium (known as the C.ex Coffs International Stadium under a sponsorship arrangement) is an Australian stadium located in the coastal city of Coffs Harbour, New South Wales.
Document 3: 2016 World Rally Championship: The 2016 World Rally Championship was the forty-fourth season of the World Rally Championship, an auto racing championship recognised by the Fédération Internationale de l'Automobile (FIA) as the highest class of international rallying. Teams and drivers competed in thirteen rounds—starting with the Rallye Monte Carlo in January and finishing with Rally Australia in November—for the World Rally Championships for Drivers and Manufacturers.
Document 4: Coffs Harbour Senior College: Coffs Harbour Senior College is an Australian school in Coffs Harbour, New South Wales. It is several kilometres south of Coffs Harbour on Hogbin Drive in an area which is becoming the centre of population distribution for the greater Coffs Harbour area. The college is a partner with TAFE and Southern Cross University on one site known as Coffs Harbour Education Campus (CHEC). The college provides opportunities for students in Years 11 and 12 to gain their Higher School Certificate.
Document 5: 2011 Rally Australia: The 2011 Rally Australia was the 21st Rally Australia and the tenth round of the 2011 World Rally Championship season. The rally took place over 8–11 September, and was based in Coffs Harbour, a coastal city in the New South Wales state of Australia. The rally was also the fifth round of the Production World Rally Championship. Rally Australia returned to the WRC calendar after a year's hiatus, and after demonstrations marred the 2009 running of the rally, held north of Coffs Harbour in the Northern Rivers area. Residents' concerns for the event meant that the rally was moved for the foreseeable future to Coffs Harbour.
Document 6: 2016 Rally d'Italia: The 2016 Rally di Sardegna (formally the 13º Rally Italia Sardegna) was the sixth round of the 2016 World Rally Championship. The race was held over four days between 9 June and 12 June 2016, and was based in Alghero, Sardinia, Italy. Hyundai's Thierry Neuville won the race, his 2nd win in the World Rally Championship.
Document 7: 2016 Rally Finland: The 2016 Rally Finland (formally known as the 66. Neste Rally Finland) was the eighth round of the 2016 World Rally Championship season, an auto racing event for rally cars. It was held over twenty-four stages based in and around Jyväskylä in central Finland from 28 July to 31 July 2016, with competitors covering 333.99 km of competitive kilometres. It was won by Northern Irishman Kris Meeke, his second win of the season. Meeke established a new record for the fastest FIA WRC round in history - the 126.60 km/h average speed beat the previous record by 1.2 km/h.
Document 8: 2004 Rally Australia: The 2004 Rally Australia (formally the 17th Telstra Rally Australia) was the sixteenth and final round of the 2004 World Rally Championship. The race was held over four days between 11 November and 14 November 2004, and was based in Perth, Australia. Citroën's Sébastien Loeb won the race, his 10th win in the World Rally Championship.
Document 9: City of Coffs Harbour: The City of Coffs Harbour (also known as the Coffs Harbour City Council) is a local government area in the mid north coast region of New South Wales, Australia. The area under administration is 1175 km2 , expanded in 2004 to take in parts of the former Pristine Waters local government area.
Document 10: Sunshine Coast, Queensland: Sunshine Coast is a peri-urban area and the third most populated area in the Australian state of Queensland. Located 100 km north of the state capital Brisbane in South East Queensland on the Pacific Ocean coastline, its urban area spans approximately 60 km of coastline and hinterland from Pelican Waters to Tewantin. The estimated urban population of Sunshine Coast as at June 2015 was 302,122, making it the 9th most populous in the country.
Document 11: 2016 Rally de Portugal: The 2016 Rally de Portugal (formally the 50. Vodafone Rally de Portugal 2016) was the fifth round of the 2016 World Rally Championship. The race was held over four days between 19 May and 22 May 2016, and was based in Matosinhos, Portugal. Citroën's Kris Meeke won the race, his 2nd win in the World Rally Championship.
Document 12: 2016 Rally Australia: The 2016 Rally Australia (formally the 25. Kennards Hire Rally Australia 2016) was the fourteenth and final round of the 2016 World Rally Championship. The race was held over four days between 17 November and 20 November 2016, and was based in Coffs Harbour, New South Wales, Australia. Volkswagen's Andreas Mikkelsen won the race, his third win in the World Rally Championship.
Document 13: Port Macquarie: Port Macquarie is a coastal town in the local government area of Port Macquarie-Hastings. It is located on the Mid North Coast of New South Wales, Australia, about 390 km north of Sydney, and 570 km south of Brisbane. The town is located on the Tasman Sea coast, at the mouth of the Hastings River, and at the eastern end of the Oxley Highway (B56). The town with its suburbs had a population of 45,698 in June 2016.
Document 14: Coffs Harbour Airport: Coffs Harbour Airport: (IATA: CFS, ICAO: YCFS) (formerly ICAO code of YSCH until November 2007) is the only airport located in and serving the regional centre of Coffs Harbour, Australia. The airport is located near Boambee, south of Coffs Harbour. Coffs Harbour Regional Airport is one of the largest and busiest regional airports in New South Wales, handling numerous types of aircraft. The airport is currently serviced by four airlines QantasLink, Virgin Australia,
Document 15: Coffs Harbour: Coffs Harbour is an Australian coastal city located on the Mid North Coast of New South Wales about 540 km north of Sydney, and 390 km south of Brisbane. It is one of the largest urban centres in the North Coast region, with an estimated population of 70,000 as of June 2017.
ground_truth: 70,000