List how many times a field is used in a column

hsparse/parse_csv_contacts.py

@@ -77,9 +77,11 @@ def csv_non_empty(CSV):
     non_empty_columns = {
         col: df[col].count() for col in df.columns if not df[col].isnull().all()
     }
-    if non_empty_columns:
-        print("Number of non-empty values for each column:")
-        for col, count in non_empty_columns.items():
+
+    sorted_columns = sorted(non_empty_columns.items(), key=lambda x: x[1], reverse=True)
+
+    if sorted_columns:
+        for col, count in sorted_columns:
             print(f"{col}: {count}")
     else:
         print("No non-empty values found.")