Index: src/routes/admin-stats.js
===================================================================
--- src/routes/admin-stats.js	(revision 37edecd7c1a492799587f07cc44fb88fbd1567ee)
+++ src/routes/admin-stats.js	(revision 6be57b4716118bcb1264cfea3f073b10963be2bf)
@@ -31,8 +31,9 @@
     } catch { linkClicks = []; }
   }
+  const days = [7, 14, 30, 90].includes(parseInt(req.query.days, 10)) ? parseInt(req.query.days, 10) : 14;
   renderPage(req, res, 'pages/admin-stats', {
     pageTitle: 'Statistieken',
     bodyClass: 'on-admin',
-    stats: getStats(14),
+    stats: getStats(days),
     linkClicks,
   });