And a new analysis shows many of Canberra's traditional economic centres are slowing down, while new pockets of industry have emerged across the city.

In 2001, Civic was Canberra's largest economy, worth $2.8 billion.

Fyshwick was the next strongest centre, with an economy worth $1.8 billion.

Today, Civic's economy is worth $6 billion and is nearly three times larger than the next highest, Fyshwick (worth $2.3 billion), according to an analysis by PricewaterhouseCoopers.

The firm tracked the 183 smaller economies that make up the territory, in a "granular" look at the ACT's economy.

"If we look at Civic, it over doubled in size," PwC's director of economics and policy, Rob Tyson, said.

"The industry mix has been diversified, there has been growth of residential and it's now emerging as a true CBD with both a day-time and night-time economy.

"This is a pattern we see playing out in other major cities, with a dominant central business district emerging to play an increasingly important role in the cities economic performance."

The data underscored the diversification that has taken place in the ACT economy, Mr Tyson said.

"Not just in terms of industry type and the growing importance of private enterprise, but also the spatial changes," he said.

"Over the last 18 years, the relative economic, employment and residential strengths of Canberra have shifted and are continuing to shift."

And while many of the traditional centres are experiencing some of the slowest rates of growth, there are pockets of strong growth in new areas.

Garran and the Canberra Airport have emerged as billion-dollar districts, Mr Tyson said.

Canberra Airport, bought by the Snow family for $65 million in 1998, did not make the top 10 in 2001 but came in at number nine in 2018, with an economic output of $1.2 billion.

Garran, which is home to the Canberra Hospital and "one of the largest and most productive health precincts in Australia", also did not rank in 2001 but now had an economic output of $1.6 billion, he added.

Meanwhile the economy of Phillip has largely stagnated. While it grew modestly from $1.5 billion in 2001 to $1.8 billion in 2018, it slipped from third to fifth place.

Belconnen moved up to third place, with its output booming to $2.2 billion last year. (It was $1.3 billion in 2001).

Barton moved up to fourth place, growing from a $1.2 billion to $2.2 billion economy in less than 20 years.

Greenway slipped from sixth to seventh place, but its economy grew from $1 billion to $1.5 billion.

Russell dropped from seventh to 10^th place, although its economy grew from $795 million to $1.1 billion.

Deakin moved up from 10^th to eighth place, with its economy growing from $605 million to $1.3 million, while Hume and Parkes have dropped out of the top 10.

The changes showed the challenges for the ACT government in providing services to existing areas, which aren't performing as well,but also expanding services into new areas, Mr Tyson said.

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Mr Tyson presented the data to the Canberra Business Chamber after the 2019 ACT budget was handed down.

The latest ACT budget showed the ACT's total economy had grown to $40 billion, bigger than Tasmania's.

More than 60 per cent of the ACT's workforce is now employed outside the public service.

Key growth industries in the past year included professional, scientific and technical services; healthcare and social assistance; administration and support services; information, media; and telecommunications and construction.

Service exports have also become a key driver of growth, tipping in $2.2 billion to the economy in the last year.