Most of the electricity in Sweden is generated by nuclear power and hydropower, although the share of renewables is steadily rising. Producers can choose whether the electricity they generate is to be sold to electricity traders or users, sold via the electricity market or used for their own purposes. Acquisitions and mergers have reduced the number of major players over the last 20 years. The largest producers in Sweden are: state-owned Vattenfall, Fortum Sverige, E.ON Sverige, Statkraft Sverige and Skellefteå Kraft. Central government owns approximately 39 percent of the installed electricity generation capacity. Foreign owners account for about 39 percent, municipally owned entities constitute about 12 percent and other owners make up the remaining 10 percent.