--- a/ckanext/ga_report/public/scripts/ckanext_ga_reports.js
+++ b/ckanext/ga_report/public/scripts/ckanext_ga_reports.js
@@ -55,24 +55,29 @@
    * Sparkline graphs should be drawn.
    * Note that they cannot be drawn sooner.
    */
+  var created = false;
   $('a[href="#totals"]').on(
     'shown', 
-    function() {
-      var sparkOptions = {
-        enableTagOptions: true,
-        type: 'line',
-        width: 100,
-        height: 26,
-        chartRangeMin: 0,
-        spotColor: '',
-        maxSpotColor: '',
-        minSpotColor: '',
-        highlightSpotColor: '000000',
-        lineColor: '3F8E6D',
-        fillColor: 'B7E66B'
-      };
-      $('.sparkline').sparkline('html',sparkOptions);
-    }
+      function() {
+        if (!created) {
+          var sparkOptions = {
+            enableTagOptions: true,
+            type: 'line',
+            width: 100,
+            height: 26,
+            chartRangeMin: 0,
+            spotColor: '',
+            maxSpotColor: '',
+            minSpotColor: '',
+            highlightSpotColor: '000000',
+            lineColor: '3F8E6D',
+            fillColor: 'B7E66B'
+          };
+          $('.sparkline').sparkline('html',sparkOptions);
+          created = true;
+        }
+        $.sparkline_display_visible();
+      }
   );
 };