The Russian economy underwent major changes after the fall of the Soviet Union in 1991. It shifted from a centrally planned economy to a market economy, implementing shock therapy reforms in the 1990s. However, this led to hyperinflation and a financial crisis in 1998. Under Putin from 2000-2008, the economy grew significantly at an average of 7% per year due to higher oil prices. However, the economy remains dependent on oil and gas exports. A global economic downturn in 2008-2009 caused GDP to contract as oil prices dropped.