How many more people lacked a car in Arlington in 2015 than in 2016, in percentage?
return people ;return #1 that lacked a car ;return #2 in   Arlington ;return #3 in   2015 ;return #3 in   2016 ;return percentage of #4 ;return percentage of #5 ;return difference of #6 and  #7
['select', 'filter', 'filter', 'filter', 'filter', 'project', 'project', 'arithmetic']