The charts compare energy consumption by source in 2005, the distribution of global oil reserves by country, and changes in world oil prices from 2000 to 2025.
Overall, oil was the most widely used energy source and Saudi Arabia owned the largest share of oil reserves. In addition, oil prices rose sharply in the mid-2000s and then increased more gradually over the following years.
In 2005, oil made up 37% of total energy use, followed by coal at 28% and natural gas at 23%. By contrast, nuclear power and hydroelectricity were far less significant, each accounting for only 6%.
Concerning oil reserves, Saudi Arabia held 20% of the world total, making it the leading producer. Canada ranked second with 14%, while Iran and Iraq represented 10% and 9% respectively. Kuwait and the United Arab Emirates each accounted for 8%, whereas Russia and the United States had relatively small shares at 5% and 2%. Other countries together made up 18%.
Oil prices started at about $30 per barrel in 2000, peaked at nearly $60 in 2005, and then declined slightly before rising steadily to approximately $55 by 2025.