Unemployment rates are slightly down in Nevada’s three main metropolitan areas. The state Department of Employment and Training reports, the rate dropped to 5.5 percent in the Reno area, down from 5.7 percent a month earlier. The Las Vegas’ jobless rate fell a tenth of a percentage point to 6.2 percent in December. It also dropped to 6.7 percent in Carson City from 6.8 percent in November.