diff --git a/bills.py b/bills.py
index 79fea32..efefdf7 100644
--- a/bills.py
+++ b/bills.py
@@ -447,7 +447,7 @@ def derive_ann_growth( bill_type, bill_info ):
     else:
         # okay use last - first / years to get a simple_growth, just need bills from different years
         # if there are totals for them (may not be set with monthly and < 12 bills in 1st year)
-        if bill_info[bill_type]['first_bill_year'] != bill_info[bill_type]['last_real_bill_year'] and bill_info[bill_type]['first_bill_year'] in total and bill_info[bill_type]['last_real_bill_year'] in total:
+        if 'last_real_bill_year' in bill_info[bill_type] and bill_info[bill_type]['first_bill_year'] != bill_info[bill_type]['last_real_bill_year'] and bill_info[bill_type]['first_bill_year'] in total and bill_info[bill_type]['last_real_bill_year'] in total:
             simple_growth=( ((total[bill_info[bill_type]['last_real_bill_year']]-total[bill_info[bill_type]['first_bill_year']])/(bill_info[bill_type]['last_real_bill_year']-bill_info[bill_type]['first_bill_year'])) / total[bill_info[bill_type]['first_bill_year']] )*100.0
             set_bill_type_growth( bill_type, 0, 0, 0, simple_growth )
         else: