The charts below show the proportion of the energy produced from different sources in a country between 1985 and 2003 Summarize the information by selecting and reporting the main features and make comparisons where relevant

The pie charts illustrate the percentage of the energy production from six various sources in a particular nation in the period from 1985 and 2003.
Overall, while oil was the dominant fuel in providing energy in the country, renewable energy was least used throughout the period.
In the first year, there was around 52% energy generated from oil, which was higher than 22% of nuclear. After that, those figures experienced a slight decrease at around 39% and 17% respectively in 2003. The energy production from hydrogen remained constantly at roughly 4% during the period.
In comparison, natural gas made up approximately 13% in producing energy followed by that of coal (8%). 18 years later, both those figures increased nearly twofold at 23% for the former and 13% for the latter. At the same period, started at 1%, the energy generated by renewable energy started going up slightly by 3% at the end of the period.