The graph provides information about the production levels of the main kinds of fuel in the UK between 1981 and 2000.
There are two basic general trends : upward, downward. As for the first trend, the production levels of petroleum rose dramatically between 1981 to 1984 ending the year at 139 energy units. Next, it steady to 1987. But then dropped suddenly between 1987 to 1990 ending the year at 100 energy units. Furthermore, the trend increase fluctuatingly between 1990 to 2000 ending the year at 140 energy units. Additionally, the production levels of natural gas rose steadily betwwen 1981 to 1991 ending the year at 44 energy units. And then, the trend increase gradually betwwen 1991 to 2008 ending the year at 100 energy units.
Regarding the second trend, the production levels of coal decrease slightly between 1981 to 1983 . But then, the trend dropped wildly between 1983 to 1984 ending the year at 39 energy units. Furthermore, the trend rose sharply between 1984 to 1986. And then dropped fractuately in 2000 ending the year at 37 energy units.
