However, the rate of increment in growing stock has been slower than the rate of increase in drain and thus size of forest biomass sink decreased gradually. The increase in the rate of drain has mainly been due to the increase in harvesting rate which is led by increased demand for forest products (EPA 2012). The drain peaked in 2005 as a result of wind throws originating from a severe storm which corresponded to the lowest quantity of CO2 removal by forests in Sweden.