Preserve distinct places in census notebook pivot

Author: rohitkumarbhagat

notebooks/analyzing_census_data_sdmx.ipynb

@@ -334,7 +334,7 @@
       "source": [
         "def filter_to_stats_only(frame):\n",
         "    frame = frame.pivot_table(\n",
-        "        index=\"entity_name\",\n",
+        "        index=[\"entity\", \"entity_name\"],\n",
         "        columns=\"variable\",\n",
         "        values=\"value\",\n",
         "        aggfunc=\"first\",\n",