the United States and Russia. Larry Elliott argued that "with the help of its Saudi ally, Washington is trying to drive down the oil price by flooding an already weak market with crude. As the Russians and the Iranians are heavily dependent on oil exports, the assumption is that they will become easier to deal with." Vice President of Russia's largest oil company, Rosneft, accused Saudi Arabia of conspiring against Russia. United States In 1998, about 40% of the energy consumed by the United States came from oil. The United States is responsible for 25% of the world's oil consumption, while having only 3% of the world's proven oil reserves and less than 5% of the world's population. In January 1980, President Jimmy Carter explicitly declared: "An attempt by any outside force to gain control of the Persian Gulf region will be regarded as an assault on the vital interests of the United States." Venezuela According to the Oil and Gas Journal (OGJ), Venezuela has of proven conventional oil reserves, the largest of any country in the Western Hemisphere. In addition it has non-conventional oil deposits similar in size to Canada's - at approximately equal to the world's reserves of conventional oil. About of this may be producible at current prices using current technology. Venezuela's Orinoco tar sands are less viscous than Canada's Athabasca oil sands – meaning they can be produced by more conventional means, but are buried deeper – meaning they cannot be extracted by surface mining. In an attempt to have these extra heavy oil reserves recognized by the international community, Venezuela has moved to add them to its conventional reserves to give nearly of total oil reserves. This would give it the largest oil reserves in the world, even ahead of Saudi Arabia. Venezuela nationalized its oil industry in 1975–1976, creating Petróleos de Venezuela S.A. (PdVSA), the country's state-run oil and natural gas company. Along with being Venezuela's largest employer, PdVSA accounts for about one-third of the country's GDP, 50 percent of the government's revenue and 80 percent of Venezuela's exports earnings. In recent years, under the influence of President Chavez, the Venezuelan government has reduced PdVSA's previous autonomy and amended the rules regulating the country's hydrocarbons sector. In the 1990s, Venezuela opened its upstream oil sector to private investment. This collection of policies, called apertura, facilitated the creation of 32 operating service agreements (OSA) with