Virginians are using less water, but every year there are more Virginians. From 2010 to 2012, the commonwealth added nearly 184,000 new residents, a 2.3 percent increase, exceeding the nation’s population growth rate. Fairfax tops the list of growing localities, adding 30,000 new residents in the last two years alone, according to 2013 figures released by the University of Virginia’s Weldon Cooper Center for Public Service.