Chinese people enter countries poor and usually do better soon. Other groups stay poor. I'm sorry to say it but the staying poor part might also be caused by those people themselves, not some external factor they cannot control.

The rape stats are also way different from how they are portrayed in the media. In Sweden, if you are in an abusive relationship, every instance of abuse is counted individually, and as Assange learned, the law is very strict. As other countries tend to do far worse at reporting and prosecuting abuse, and as other countries tend to count all occurrences of abuse together as one crime, the numbers are not directly comparable to other countries.

Yet in Sweden they measure immigrants and Swedes in the same way and it's five times as much on average while some migrant groups singled out are doing better than native Swedes.