question: How many fewer cases of hypertension is TX expecting to see in 2010 comapred with 2030?
#1 return TX 
#2 return expecting cases of hypertension in  2010 of  #1 
#3 return expecting cases of hypertension in  2030 of  #1 
#4 return number of  #2 
#5 return number of  #3 
#6 return the  difference of #4 and  #5