diff --git a/analysis/measures_definition_pf_codes_conditions.py b/analysis/measures_definition_pf_codes_conditions.py
index 5c61e0f..98d38be 100644
--- a/analysis/measures_definition_pf_codes_conditions.py
+++ b/analysis/measures_definition_pf_codes_conditions.py
@@ -17,7 +17,7 @@
 measures.configure_dummy_data(population_size=1000)
 
 start_date = "2023-11-01"
-monthly_intervals = 9
+monthly_intervals = 12
 
 registration = practice_registrations.for_patient_on(INTERVAL.end_date)
 ethnicity_combined = get_latest_ethnicity(