The economy slowed in 2012, growing by 1.3%, as hydrocarbons output declined due to scheduled maintenance activities. GDP contribution from the oil and gas sector, which accounts for about two-thirds of the economy, 98% of exports and 93% of government revenues, shrank by 3.2% last year, the IMF said. However, this was off-set by strong growth in the non-energy sector of 5.1%.