|Networked Gas Consumption by Sector 2011-2018|
|% of row||Gigawatt hours|
|Year||% Power Plants||% Non-Residential||% Residential||Total|
Power plants accounted for 61% of total networked gas consumption in 2018 compared with 24% by the non-residential sector and 14% by the residential sector (see Headline Table and Figure 1). This pattern was broadly similar in 2011 to 2017. Total consumption was 57,129 gigawatt hours in 2018, an increase of 4.4% over 2017 consumption, and the highest consumption over the 2011-2018 period. The increase in consumption in 2018 was comprised of a 1.6% increase in consumption by power plants, a 6.9% increase by the non-residential sector and a 13.5% increase by the residential sector (see Tables 2B, 2C, and 2D).
There is strong seasonal variation in networked gas consumption by households. The January to March quarter has by far the highest consumption, at 46% of the annual total in 2018. In contrast July to September accounted for only 5% of total residential consumption in 2018 (see Table 2D and Figure 2). Seasonal variation was less evident in other sectors with the third quarter of 2018 accounting for 28% of total usage by power plants and for 19% in the non-residential sector (see Tables 2B and 2C).