diff -r 1b8b29c0e95c -r 245b4df137d3 server/src/app/Http/Controllers/Api/ThemeController.php
--- a/server/src/app/Http/Controllers/Api/ThemeController.php	Tue Dec 13 23:30:54 2016 +0100
+++ b/server/src/app/Http/Controllers/Api/ThemeController.php	Fri Dec 16 17:43:07 2016 +0100
@@ -93,6 +93,11 @@
                                     "size" => ($termSize==0)?2147483647:$termSize,
                                     "order" => [ $order_field => $order_dir ]
                                 ]
+                            ],
+                            "subjects_count" => [
+                                "cardinality" => [
+                                    "field" => "subject.label_code"
+                                ]
                             ]
                         ]
                     ]
@@ -128,7 +133,7 @@
             ];
         }
 
-        return response()->json(['themes' => $themes ]);
+        return response()->json(['themes' => $themes, 'meta' => [ 'total' => $esRes['aggregations']['subjects']['subjects_count']['value']] ]);
 
     }