diff --git a/src/org/april/hebdobot/model/stats/ReviewDatas.java b/src/org/april/hebdobot/model/stats/ReviewDatas.java
index c06f63d..bb6b90b 100644
--- a/src/org/april/hebdobot/model/stats/ReviewDatas.java
+++ b/src/org/april/hebdobot/model/stats/ReviewDatas.java
@@ -23,6 +23,8 @@ import java.util.Collections;
 import java.util.Iterator;
 
 import org.april.hebdobot.model.stats.ReviewDataComparator.Sorting;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * The Class Stats.
@@ -30,6 +32,7 @@ import org.april.hebdobot.model.stats.ReviewDataComparator.Sorting;
 public class ReviewDatas extends ArrayList<ReviewData>
 {
     private static final long serialVersionUID = 326880908257489774L;
+    private static final Logger logger = LoggerFactory.getLogger(ReviewDatas.class);
 
     /**
      * Instantiates a new ReviewDatas.
@@ -58,6 +61,7 @@ public class ReviewDatas extends ArrayList<ReviewData>
                 result += 1;
             }
         }
+        logger.debug("Cleaned review data: {}", result);
 
         //
         return result;