Detail Sampel

the diagram illutrates the total of the main kinds of fuel was produced in the UK from 1981 to 2000. In general, the petrolium was the most produced fuel in 19 years while the natural gas was the least one. First, at the period of 1981 to 2000, the data of the petroleum changed but it still remain the most produced. in 3 years from the start, this fuel was grown from 90 to 140 energy units and it stay remain at that scale for the next 2 years. Then, there was a decline of petroleum between 1986 and 1990 (from 140 to 100 energy units). After that, this fuel rose graduately for the next 5 year and ended up by flutuating between 140 energy units until 2000. Second, the datas for the coal and the natural gas had opposite trend of growth. From 1981 to 1983, both these elements fluctuated around 80 for coal and around 40 for natural gas. in the next 6 years ,the data of natural gas still reamain at that stage while the data of coal had a decline ( from 80 to 40)) then grew back (from 40 to 60) and flutuate about 60 energy units. At last, until 2000, the data of natural gas have a stable growth and ended up at 100 energy units while coal reduced down to 40 energy units.