Please Help Review My Task 1

The line graph compares how much electricity was generated from various energy sources to electrify all households and facilities in the city of New York between 1980 and 2000.

Overall, the figures for petroleum and natural gas saw a mostly upward trend, with petroleum being the main source of electricity throughout the time. Meanwhile, despite a rise during the first five years, that of coal plunged steadily over the remaining period.

Starting with 100, the figure for natural gas remained more or less static for five years, after which it soared exponentially, reaching its peak of slightly over 500 in 2000. Regarding petroleum and coal, they produced about 350 million and 210 million kW of hours respectively in 1980. Five years following, both figures rose noticeably, registering 600 and 300 correspondingly, prior to dipping back to its starting point after five years. With respect to petroleum, its amount of electricity increased substantially to about 710 between 1990 and 2000, supplying the most energy compared to others. In contrast, that of coal plunged marginally to nearly 190 over the same period.