Update app.py

app.py

@@ -115,7 +115,15 @@ def filter_results(results, country_filter, region_filter, end_year_range):
     for r in results:
         metadata = r.payload.get('metadata', {})
         countries = metadata.get('countries', "[]")
-        end_year_val = float(metadata.get('end_year', 0))
+        year_str = metadata.get('end_year')
+        if year_str:
+            extracted = extract_year(year_str)
+            try:
+                end_year_val = int(extracted) if extracted != "Unknown" else 0
+            except ValueError:
+                end_year_val = 0
+        else:
+            end_year_val = 0
 
         # Convert countries to a list
         try: