A graph of Adelaide CBD population that starts around 5,000 residents before 1840. A steep increase to a peak of about 43,000 residents in 1913 before dropping off to around 30,000 15 years later. A small peak of 35,000 residents in the early 1950s before a greater decrease to 14,000 residents in 1972. Also pointed out was the state population exceeded 500,000 in 1921 and hit 1 million in 1963. In 2021, there are 18,200 residents and 130404 local workers in the CBD.