You can see movements on the graph, which describe the electricity tariff sine 1970 until 2006. In the beginning the price was at 6 cent/kWh and has and steady upward trend over the period. In the year of 1989 the price soars from 12,5 to 15 cent/kWh, but stabilizes in the period between 1990 and 2000. Afterwards the movement takes a significant upward trend till 2006. Now we know that the movement will follow a decreasing trend because of the economic problems all over the world.