You can use the following Cost of Gas calculator to estimate how much you are spending on gasoline in an average month from this it will estimate your average cost of gas per year as well.
South Africa Population growth rate. Factbook > Countries > South Africa > Demographics. Population growth rate: 0.99% (2016 est.) Definition: The average annual percent change in the population, resulting from a surplus (or deficit) of births over deaths and the balance of migrants entering and leaving a country. The rate may be positive or negative.
Our estimated population is 167,651 as of June 2012; over the last year the City's population increased by 7,340 people (4.5% growth rate) . We service an area of 683 square kilometres, which includes bushland, wetlands, urban and rural areas as well as 32 kilometres of beautiful coastline.