area chart not working on firefox

contactashish13 · contactashish13 · commit 0a000d09c7d6 · 2017-12-22T13:07:55.000+05:30
diff --git a/samples/area.csv b/samples/area.csv
@@ -1,5 +1,5 @@
 Month,Bolivia,Ecuador,Madagascar,Papua New Guinea,Rwanda
-date,number,number,number,number,number
+string,number,number,number,number,number
 2004/05,165,938,522,998,450
 2005/06,135,1120,599,1268,288
 2006/07,157,1167,587,807,397
