The countries having the largest percentage of their total electricity being generated by nuclear power are: Lithuania (80%), France (78%), Slovakia (65%), Belgium (57%), Bulgaria (47%), Ukraine (48%), Slovenia (41%), Armenia (41%) and Switzerland (40%). The U.S currently generates about 20% of its electricity from nuclear power. In what has been described as "the biggest referendum in the country's history," 66% of Swiss voters rejected a call to phase out Switzerland's nuclear power plants and 58% voted to end the country's current moratoriam on new nuclear power plant construction.