Numbers don’t even seem to add up, or something strongly changed between 2007 and 2010.
Also, you’re either a troll or a very incompetent researcher. You should absolutely never ever rely on LLMs to serve you any factual data. LLMs are highly prone to hallucinations.
Generally, the migrant crime rate increased in 2008-2014, but then decreased throughout 2015-2019. In total, the change averages to about zero.
As per reasoning, two primary forces are demonstrated: on one hand, poorer material conditions, and on the other, the fear of being deported. In 2015-2019, during refugee crisis, being sent back could mean essential death sentence, which shifted the balance. All of this is to say that we should improve material conditions for migrants if we want the crime rates among them to drop further. Instead, it is currently done under threats of deportation.
The only thing left unanswered for me is sexual violence. But in Germany, the difference between natives and locals is not as big as to justify mass measures against an entirety of migrant population.