In view of these data, the Government has established the objective for the five-year period 2008-2012 to ensure that the totals in Spain do not exceed an increase of 37% with respect to the emissions of the base year. This represents a 22 percentage point difference compared to +15%, of which 2% must be obtained through sinks and the rest (20%) through flexibility mechanisms (acquisition of carbon credits). In order to reach the indicated objective of +37%, the 2008-2012 PNA required the implementation of additional measures to those already planned that would achieve annual reductions of 37.7 Mt CO eq. The 2006 energy balance data shows that part of these reductions have already occurred, and that the projected scenario is now below the previous efficiency scenario. This reduces the need for new additional reductions to 27.1 Mt COeq/year.