Following from the previous thread on the carbon tax and electricity prices I have graphed the change in electricity prices using the ABS CPI data (tables 12 and 13). ABS data goes back to the early 80s – but there are some huge numbers there so I start the graphs in 1990.
So the latest electricity price increases are the single largest quarterly increase since 1990 including the introduction of the GST. So let’s have a look at the annual data.
Again the single largest increase since 1990 – just edging out March 2010 (18.5% to 18.3%). The other observation is the massive run up in price increases since 2008.
So then I thought I’d compare quarterly changes in electricity prices with the overall quarterly changes in CPI. Again it looks like a big change since 2008.
Finally it was suggested earlier on twitter that there might be some sort of September quarter seasonal effect driving the large price increase. So I graphed just the September quarter figures.