How many percent of Saratoga Countys population in 2010 was over the age of 18?
return Saratoga Countys ;return population of #1 ;return #2 in  2010 ;return ages of #3 ;return #3 where #4 is higher than 18 ;return percent of #5
['select', 'project', 'filter', 'project', 'comparative', 'project']