Department of Infrastructure, Transport, Regional Development, Communications and the Arts
Calendar year data.    Source: Telstra (2021); Telstra Annual Report 2021, p.9,  "We expanded our 5G footprint to cover 75   per cent of Australians where they live   and our 4G footprint to 99.5 per cent of   all Australians"    https://www.telstra.com.au/content/dam/tcom/about-us/investors/pdf-g/0821-TEL-AR-2021-FINAL-Interactive.pdf"  