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.
ï§The number of 15-64s will increase as a share of total population from 63.2% of the total population in 2012 to 65.1% in 2030. ï§Between 2012 and 2030 the population aged 65+ is due to grow by 95.3% (a rate over five times faster than total population growth) to reach 1.3 million.