Netflix is having a huge impact on Australia's internet infrastructure, with some claiming it is leading to slower, congested internet speeds during peak evening use periods.

But exactly how much of an impact is the streaming giant's service having?

While many telcos don't publish or release their traffic graphs, non-profit organisation IX Australia — which helps physically connect smaller ISPs with content players — does.

Australians' hunger for data continues to grow, with the volume of total downloads in the final quarter of 2014 exceeding an exabyte - or 1 million terabytes - for the first time.

Data released on Tuesday from the Australian Bureau of Statistics (ABS) show Australians downloaded 1.15EB of data in the three months to December 2014, an increase of 33 per cent on the same period in 2013.

Australians are also connecting faster, with the number of internet subscribers with connections at advertised speeds of 25 megabits per second (Mbps) or higher - faster than the maximum speeds available on ADSL2+ - rising 11 per cent to 2.34 million.