Help With =AVERAGEIF

I am trying to calculate average On Time Delivery %, however i only want the percent to be included in the average calculation if the number in the "days aged" column is greater than or equal to 0 ("On Time" = 0). I came up with this formula below but I'm getting a divide by 0 error, any help would be greatly appreciated!

=AVERAGEIF(H5:H32,I5:I32>=0)

**Please see attached file**