Making IF= Formulation come back as N/A

I have just started learning to use more complicated formulas in excel.

I am trying to create an IF formula so when i try to get the percentage change if lets say the 2008 number was 0 and the 2009 number increased by 9 than i would get an error so i want the if formula to come back as n/a.

sorry i am a complete noob at this and would appreciate the help.

here i have attached a sample for a better understanding.