The given pie charts illustrate the percentage of energy production, experienced alterations during a 20-year period in US.
Overall, most of the energetic sources contemplated growths and falls, noticeably excepting hydropower, which remained the similar all over the years.
Looking specifically at Oil, it accounted for the leading 43% in 1983. However, after 20 years, in 2003, it slightly decreased to 38%. In addition to declined power sources, Coal amounted just above a fifth (23%) in the outset, then dropped to near a half (13%) at the end of the period.
Conversely, in 1983, Natural gas showed a double rise beginning just above one ten (11%), than exceeded to 21% in 2003. As a comparison to the significant growth, the manufacturing of Nuclear power was accounted for a fifth. In the end of the period, it slightly rose to 24% in 2003. As a sophisticated detail, Hydropower was stabile all over the years, with a minor 4 %.
