diff --git a/infrastructure/condition/parsing/calico_parser.py b/infrastructure/condition/parsing/calico_parser.py
index bc41a8c42..e6a106f78 100644
--- a/infrastructure/condition/parsing/calico_parser.py
+++ b/infrastructure/condition/parsing/calico_parser.py
@@ -36,12 +36,11 @@ class CalicoParser(Parser):
         rows = sheet.iter_rows(values_only=True)
         column_index = CalicoParser._column_indexes(next(rows))
 
-        assets = CalicoParser._parse_assets(rows, column_index)
+        assets = self._parse_assets(rows, column_index)
         return self._group_assets_into_properties(assets)
 
-    @staticmethod
     def _parse_assets(
-        rows: Any, column_index: Dict[str, int]
+        self, rows: Any, column_index: Dict[str, int]
     ) -> List[CalicoAssetCondition]:
         assets: List[CalicoAssetCondition] = []
         for row in rows:
@@ -49,6 +48,7 @@ class CalicoParser(Parser):
             if covering_type is None:
                 # A blank covering type is a placeholder row (no roof-covering
                 # record captured), not an observation -- drop on parse.
+                self._blank_placeholder_count += 1
                 continue
             assets.append(
                 CalicoAssetCondition(
@@ -77,6 +77,7 @@ class CalicoParser(Parser):
         for reference, grouped_assets in assets_by_ref.items():
             uprn = ref_to_uprn.get(str(reference))
             if uprn is None:
+                self._unmatched_reference_count += 1
                 logger.debug(
                     f"[CalicoParser] No UPRN for asset reference {reference}; dropping"
                 )