"pws80" (who seems to be an accountant as far as you can tell on a social media site) gives the following list:
2004 - 24.52c
2005 - 26.46c
2006 - 27.81c
2007 - 29,45c
2008 - 39.52c
2009 - 50.04c
2010 - 72.56c
2011 - 105.21c
2012 - 152.55c
It is, according to his calculations, the price per Kwh of electricity now as charged by Eskom.
So, what are the prices of electricity elsewhere?
According to a blog of an ex-UK guy living in Australia:
"Therefore England equals 8.49p per kWh.
……And Australia equals 17.13c per kWh."
and
"In the USA, a kWh is 11.86c (USA)"Quick conversions of currency with Google:
UK: 95c
OZ: 110c
US: 85c
So, next year, even with the 45% increase, we will still be beating (slightly) the UK, Australia and the US in cheapest electricity. The year after that we will be pretty much in line with the developed world in terms of electricity prices. The next year - we will be about 50% more expensive.
These are rough figures but it would be nice to know at what stage we can take "South Africa has the world's cheapest electricity" off our "Reasons why we love South Africa".
It would be fun also to compare the prices above with "% of average salary"