Russia's Economic Development and Trade Ministry has summarized the results of the country's economic development in December increasing the earlier forecasted GDP, investment and industrial production growth, Itar-Tass reported. The data are rather optimistic - the GDP in December 2007 grew by 8.4 percent as compared with December 2006. This makes it possible to adjust the forecasts (earlier made for this year) from 7.6 percent to 7.7-7.8 percent,” Economic Development and Trade Minister Elvira Nabiullina said at a meeting with Russian President Vladimir Putin on Monday. "The investment growth in December 2007accounted for 24 percent as compared with December 2006, therefore the year's estimate has grown from 20 to 21.1 percent,” she emphasized.