These visitors spent 59 million nights in the city and a total of $5.9 billion. The countries of origin in descending order were China, New Zealand, the United Kingdom, the United States, South Korea, Japan, Singapore, Germany, Hong Kong, and India. The city also received 8.3 million domestic overnight visitors in 2013 who spent a total of $6 billion. 26,700 workers in the City of Sydney were directly employed by tourism in 2011. There were 480,000 visitors and 27,500 people staying overnight each day in 2012. On average, the tourism industry contributes $36 million to the city's economy per day. Popular destinations include the Sydney Opera House, the Sydney Harbour Bridge, Watsons Bay, The Rocks, Sydney Tower, Darling Harbour, the State Library of New South Wales, the Royal Botanic Garden, the Australian Museum, the Museum of Contemporary Art, the Art Gallery of New South Wales, the Queen Victoria Building, Sea Life Sydney Aquarium, Taronga Zoo, Bondi Beach, Luna Park and Sydney Olympic Park. Major developmental projects designed to increase Sydney's tourism sector include a casino and hotel at Barangaroo and the redevelopment of East Darling Harbour, which involves a new exhibition and convention centre, now Australia's largest. Sydney is the highest-ranking city in the world for international students. More than 50,000 international students study at the city's universities and a further 50,000 study at its vocational and English language schools. International education contributes $1.6 billion to the local economy and creates demand for 4,000 local jobs each year. Demographics The population of Sydney in 1788 was less than 1,000. With convict transportation it almost tripled in ten years to 2,953. For each decade since 1961 the population has increased by more than 250,000. The 2021 census recorded the population of Greater Sydney as 5,231,150. The Australian Bureau of Statistics (ABS) projects the population will grow to between 8 and 8.9 million by 2061, but that Melbourne will replace Sydney as Australia's most populous city by 2026. The four most densely populated suburbs in Australia are located in Sydney with each having more than 13,000 residents per square kilometre (33,700 residents per square mile). Between 1971 and 2018, Sydney experienced a net loss of 716,832 people to the rest of Australia, but its population grew due to overseas arrivals and a healthy birth rate. The median age of Sydney residents is 36 and 12.9% of people are 65 or older. The