Infer Bezirk value from total if only one entry is missing

wsgi.py

@@ -292,8 +292,16 @@ def _print_as_html(
 ) -> list[str]:
     df = df.astype({"Digitale Befragung": "Int32"})
     num_missing = (df[df.isna().any(axis=1)]["Landesbezirk"] != "Hessen").sum()
+    if num_missing == 1:
+        # infer value from total
+        df_tmp = df.loc[df["Landesbezirk"] != "Hessen"]
+        idx = df_tmp.loc[df_tmp.isna().any(axis=1)].iloc[0].name
+        df["Digitale Befragung"].loc[idx] = (
+            total - df.dropna()["Digitale Befragung"].sum()
+        )
     if dropna:
         df = df.dropna()
+
     with pd.option_context("display.max_rows", None):
         table = df.to_html(
             index_names=False,