The pie charts illustrate the proportion of overall energy consumption from five different sources in 1985, 1995, and 2005.
Overall, while the percentage of natural gas and especially gas showed an upward trend, the reverse was true for renewable energy and nuclear. By contrast, oil increased, before returning to its original level. Additionally, nuclear and oil were the main sources of energy consumption.
Focusing on the higher numbers first, starting at 31%, the proportion of nuclear declined noticeably to 25% by 1995. Later, it remained stable, at 25%. The figure for renewable energy plummeted from 27% to 18% by the end of the period. However, the percentage of oil increased slightly to 30% in 1995, after which it returned to its original level of 25%.
By comparison, gas and natural gas increased, albeit to varying degrees. Starting at 9% in 1985, the proportion of gas rose to 14% by 2005. Moreover, the figure for natural gas experienced a marginal rise from 8% to 11%
