The line graph gives information about basic fuels in a European country which are Petroleum, coal, and natural gas in 20 years from 1981. Units measured in tonnes

Task 1
The line graph gives information about basic fuels in a European country which are Petroleum, coal, and natural gas in 20 years from 1981. Units measured in tonnes.
Overall, it can be clearly seen that Petropleum was the most common production rather than others in Europe in the whole given period.
Looking clearly into details, the number of Petropoleum stood at 100 in 1981 and it was more 20 tonnes than degree of Coal. After going up to about 130 in the first 5 years, amount of Petroleum remained stabily till about 1989. Despite of falling dramatically by 30 in 1994, its number peaked to 130 in 1997. There was a slight drop to 120 in last years of given period. Meanwhile, there was a constant amount in Coal till almost 1986. After that its degree dropped significantly to about 50 in 1990. Having negligible gone up to 60 in 1994 , percentage of Coal reduced markeably till 2000 and its degree was last place by just above 40.
When it is come to Natural Gas, its proportion was 40 and it was half part of Coal in 1981. Its number remained stabily from 1981 to 1994. Having equaled to coal by about 50 tonnes in 1997, level of Natural Gas rose up noticeably to more than 80 in 2000.