 In November 2000 and March 2001, the Parliament amended the Constitution changing its bicameral structure back into historic unicameral and reducing the presidential powers.Although Croatia experienced a significant boom in the economy in the early 2000s, the increase of the government debt and the absence of concrete reforms led to a financial crisis in 2008 which forced the government to cut public spending thus provoking a public outcry.On 1 April 2009, Croatia joined NATO.