The provided line chart illustrates the amount of electricity ( millions kilowatt per hours ) was generated by three distinct sources of energy in New York city, over the course of five years, commencing in 1980 and concluding in 2000. Overall, most of energy witnessed a drecease throughout the years, except for natural gas. In addition, petroleum was always the main contributor for electricity production.
Concerning the highest figure, petroleum consistently higher than others over the period. Moreover, in the first recorded year, petroleum stood at 100 before it was significant rising and hit its peak at roughly 130 in the following year. Then, between 1984 and 1992, the contribution of petroleum for electricity generation plummeted by 30 and went back to the beginning data. However, in the rest time, petroleum fluctuated around 100 to over under 130, and stopping at 120 in the final year.
Regarding the other sources, in 1980, the total electricity was produced from coal more than natural gas, coal at 80 and the others was just 40, respectively. Additionally, coal had a dramatical decline from 1984 to 1998, whereas the gas from nature remained constant. In 1996, natural gas surpassed coal and became the second highest until the last year. In 2000, natural gas reach at 80, nearly two times as high as than coal, which was only over 40.