12.0.2. The percentage provided for in subparagraph 4 of the first paragraph of section 12 is increased, effective as of 1 April 2013, by 1.25 times the difference between the cumulative growth of the nominal gross domestic product (GDP) of Québec according to the data from Statistics Canada for 2010, 2011 and 2012 and the forecasted cumulative growth of the nominal GDP of Québec for the same years, established at 3.8% for 2010, at 4.5% for 2011 and at 4.4% for 2012. The increase so calculated is reduced by the increase granted on 1 April 2012 pursuant to section 12.0.1. The sum of the increase granted on 1 April 2012 and the increase granted on 1 April 2013 pursuant to this section may not be greater than 2%.