How many more billion dollars worth of tickets to Broadway theatre shows were sold in 2013-2014 than in 2012-2013?
return Broadway theatre shows ;return tickets sold in  2013-2014 of #1 ;return tickets sold in  2012-2013 of #1 ;return worth in  billions of dollars of  #2 ;return worth in  billions of dollars of  #3 ;return the  difference of #4 and  #5
['select', 'project', 'project', 'project', 'project', 'arithmetic']