diff --git a/src/main/java/de/hottis/mbusMaster/MbusDevice.java b/src/main/java/de/hottis/mbusMaster/MbusDevice.java
index 1736e95..1b7130c 100644
--- a/src/main/java/de/hottis/mbusMaster/MbusDevice.java
+++ b/src/main/java/de/hottis/mbusMaster/MbusDevice.java
@@ -66,7 +66,7 @@ abstract public class MbusDevice {
   }
 
   public double getErrorRatio() {
-    return this.errorCnt / (this.successCnt + this.errorCnt);
+    return (double)this.errorCnt / (double)(this.successCnt + this.errorCnt);
   }
 
   public void parse(byte[] frame) throws MbusException {
diff --git a/src/main/java/de/hottis/mbusMaster/MbusScheduledQuerier.java b/src/main/java/de/hottis/mbusMaster/MbusScheduledQuerier.java
index 613ede8..6797abb 100644
--- a/src/main/java/de/hottis/mbusMaster/MbusScheduledQuerier.java
+++ b/src/main/java/de/hottis/mbusMaster/MbusScheduledQuerier.java
@@ -69,7 +69,7 @@ public class MbusScheduledQuerier extends Thread {
           }
         }
         logger.info("CycleCnt: " + cnt + ", SuccessCnt: " + successCnt + ", ErrCnt: " + errCnt);
-        this.queue.add(new MbusStatisticsDataObject("MbusgwChild", errCnt, successCnt));
+        this.queue.add(new MbusStatisticsDataObject("MbusgwChild", errCnt, successCnt, ((double)errCnt / (double)(errCnt+successCnt))));
         try {
           Thread.sleep(5*1000);
         } catch (InterruptedException e) {
diff --git a/src/main/java/de/hottis/mbusMaster/MbusStatisticsDataObject.java b/src/main/java/de/hottis/mbusMaster/MbusStatisticsDataObject.java
index e110e8d..20d0844 100644
--- a/src/main/java/de/hottis/mbusMaster/MbusStatisticsDataObject.java
+++ b/src/main/java/de/hottis/mbusMaster/MbusStatisticsDataObject.java
@@ -6,14 +6,16 @@ public class MbusStatisticsDataObject extends ADataObject {
 	private static final long serialVersionUID = 1L;
 	static final String ERROR_CNT_KEY = "error";
 	static final String SUCCESS_CNT_KEY = "success";
+	static final String ERROR_RATIO_KEY = "errorRatio";
 	static final String TABLE_NAME = "Statistics";
   static final String KIND_NAME = "Statistics";
 	
-	public MbusStatisticsDataObject(String name, int error, int success) {
+	public MbusStatisticsDataObject(String name, int error, int success, double errorRatio) {
 		super(name, KIND_NAME);
 		HashMap<String, Object> values = new HashMap<String, Object>();
 		values.put(ERROR_CNT_KEY, error);
 		values.put(SUCCESS_CNT_KEY, success);
+		values.put(ERROR_RATIO_KEY, errorRatio);
 		setValues(values);
 	}