The two graphs illustrate the main sources of energy in the USE in between 1980 and 1990.
Overoll. Both pictures the heighest sourse is oil after that natural gas settled almost with the same level. The small figure is belong to hydroelectric power and both year the same level (5%).
The first year oil stayed domenated with (42%). And this fegure did differnce next decade with (33%). Natural gas settled after oil with (26%) and this figure almost the same with next decade (25%). Coal settled third position with (22%) but in the 1990 coal rose to a bit level (27%)
Hydroelectric power stood the same position in both year.
