The given charts portray the picture of energy consumption on a global scale, alongside oil reserves and oil prices from 2000 to 2025. Overall, there were distinct characteristics among these charts, with energy consumption categorized by type, followed by oil reserves estimated by billion barrels, and oil prices measured by dollars per barrel.
Regarding energy usage, in 2005, fossil fuels claimed the greatest total percentage of 78% in total, which, in detail, was oil, natural gas, and coal at 37%, 23%, and 18%, respectively. Moreover, looking at reusable energy, there are only 6% for each member in this sector, including nuclear and hydro-electric. In terms of oil reserves, almost every listed country has a percentage of billion barrels below 10%, with the lowest and hig hest figures being 2% and 10% for Iran and the United States, respectively. Conversely, Saudi Arabia has showcased the tantamount number of billion barrels at almost 20% of the overall figure, followed by other countries (18%).
With respect to dollars per barrel, from 2000 to 2005, a parabola-like tendency appeared, initially recorded at 40 dollars, dropping slightly in the mid-range period, then surging up thoroughly to almost 60 dollars at the end of this period. This then exhibited a slight decrease with the total load of 10 dollars on average, after which it remained stable until 2020 and went up to around 55 dollars in 2025.