--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/common/AbstractResultType.java	Wed Oct 17 13:57:34 2018 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/common/AbstractResultType.java	Wed Oct 17 16:00:38 2018 +0200
@@ -35,9 +35,6 @@
 
     private final String pdfHeader;
 
-    private static String YES = null;
-    private static String NO = null;
-
     protected AbstractResultType(final String unit, final String csvHeader, final String pdfHeader) {
         this.unit = unit;
         this.csvHeader = csvHeader;
@@ -68,13 +65,9 @@
             throw new IllegalStateException();
 
         if ((boolean) value) {
-            if (YES == null)
-                YES = Resources.getMsg(context.getMeta(), String.valueOf(value));
-            return YES;
+            return Resources.getMsg(context.getMeta(), String.valueOf(value));
         } else {
-            if (NO == null)
-                NO = Resources.getMsg(context.getMeta(), String.valueOf(value));
-            return NO;
+            return Resources.getMsg(context.getMeta(), String.valueOf(value));
         }
     }