The graph below shows the usage of oil in four different countries between 1966 and 2006 as a percentage of total energuy use within each nation.

The line chart provides information about the portion of oil used in 4 countries,namely Iceland,Sweden,Italy, and

Turkey

,over a 40-year period from 1966 to 2006.

Overall

, one outstanding feature of the data is that Iceland's and Sweden's use clearly illustrate a moderate decrease throughout the time,

while

generating energy from oil in Italy and

Turkey

represents a slight alteration,with

Turkey

experiencing an upward trend

as well as

a slow downward shift for Italy

at the end

. Regarding the two countries mentioned in the first statement,both nations reached a trough at the final,standing at 20% for Iceland and 35% for Sweden. As far as

Turkey

's numerical records of energy usage are concerned, it started at 60% at the beginning point and gradually increased till reaching a peak at 90% in 2006.

Furthermore

,the oil energy manufactured by Italy was the highest volume at 95% in 1976 and shows variable fluctuations over 30 years,comprising 85% at the final.