diff --git a/src/pg/sql/41_observatory_augmentation.sql b/src/pg/sql/41_observatory_augmentation.sql
index b4f4527..604449c 100644
--- a/src/pg/sql/41_observatory_augmentation.sql
+++ b/src/pg/sql/41_observatory_augmentation.sql
@@ -32,7 +32,7 @@ AS $$
   BEGIN
 
   IF time_span IS NULL THEN
-    time_span = '2010 - 2014';
+    time_span = '2009 - 2013';
   END IF;
 
   IF boundary_id IS NULL THEN