dependence on primary industries. World War II brought industrial stimulus and diversification to Adelaide under the Playford Government, which advocated Adelaide as a safe place for manufacturing due to its less vulnerable location. Shipbuilding was expanded at the nearby port of Whyalla. The South Australian Government in this period built on former wartime manufacturing industries but neglected cultural facilities which meant South Australia's economy lagged behind. International manufacturers like General Motors Holden and Chrysler made use of these factories around the Adelaide area in suburbs like Elizabeth, completing its transformation from an agricultural service centre to a 20th-century motor city. The Mannum–Adelaide pipeline brought River Murray water to Adelaide in 1955 and an airport opened at West Beach in 1955. Flinders University and the Flinders Medical Centre were established in the 1960s at Bedford Park, south of the city. Today, Flinders Medical Centre is one of the largest teaching hospitals in South Australia. In the post-war years around the early 1960s, Adelaide was surpassed by Brisbane as Australia's third largest city. The Dunstan Governments of the 1970s saw something of an Adelaide 'cultural revival', establishing a wide array of social reforms. The city became noted for its progressivism as South Australia became the first Australian state or territory to decriminalise homosexuality between consenting adults in 1975. Adelaide became a centre for the arts, building upon the biennial "Adelaide Festival of Arts" that commenced in 1960. The State Bank collapsed in 1991 during an economic recession. The effects lasted until 2004, when Standard & Poor's reinstated South Australia's AAA credit rating. Adelaide's tallest building, completed in 2020, is called the Adelaidean and is located at 11 Frome Street. 21st century In the early years of the 21st century, a significant increase in the state government's spending on Adelaide's infrastructure occurred. The Rann government invested A$535 million in a major upgrade of the Adelaide Oval to enable Australian Football League to be played in the city centre and more than A$2 billion to build a new Royal Adelaide Hospital on land adjacent to the Adelaide Railway Station. The Glenelg tramline was extended through the city to Hindmarsh down to East Terrace and the suburban railway line extended south to Seaford. Following a period of stagnation in the 1990s and 2000s, Adelaide began several major developments and redevelopments. The Adelaide Convention Centre was redeveloped and expanded at a cost of A$350 million beginning