Nevada bucked a national trend on Election Day when it posted the highest percentage increase in voter turnout in the country compared with the presidential contest four years ago, officials said Tuesday.Voter turnout in the state was up 4.5 percent, while national turnout dropped below 2008 levels, Nevada Secretary of State Ross Miller said.“Nevada ran again a very clean election,” Miller told state Supreme Court justices, who were briefed on the election before certifying the results for statewide and legislative races.Miller credited Nevada’s two-week early voting period along with online registration availability for helping boost turnout. He said 619,381 votes …