"Thousands of migrants dumped from Germany". What's behind this number

The Germans "throwed", "throwed" to Poland "nine 1000 illegal migrants" - the politicians of Confederates and PiS have been saying for a long time. Although this number comes from German statistics, specified a transmission is manipulation and a game on emotions designed to origin anxiety in society. due to the fact that it's not all about visitors from Africa or Asia. Explain.